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Standard Deviation

10 pages (2500 words)

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...Standard deviation is one of several procedures to predict profit / loss on an investment.
What is standard deviation
Standard deviation can defined as "a measure of the dispersion of outcomes around the mean (or expected value), used to measure total risk. It is the square root of the variance."(1)
Standard deviation, represented by the lowercase form of the Greek... Aftab Ahmed Aftab 01 Karachi, Pakistan 19-July-2008 Every rational investor wants to invest money in an investment which will give him more money. But the question arises how can one make choice between a set of investments There are number of theories regarding how an investor view risk and prefers one investment over the other ones. ...

Correlating the standard deviation

3 pages (750 words)

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...Standard Deviation America football is a common sport in the United s of America and is referred to as football. The teams that play the game are usually two each with eleven players. The sport is played on a field with a length of 120 and width of 53.3 yards and goalposts placed on each end of the field. The roles of the football players are broadly classified into offense and defense. The defense team made up of defensive tackle and end who are usually four, safety, linebacker and corner-back. While the offense team consist of a quarterback, left and right guard; running back, center, fullback, tight end, wide receiver, Left, and right tackle. My goal in this paper... Lecturer Unit Correlating the...

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Standard Deviation and Outliers

1 pages (250 words)

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...Standard Deviation and Outliers Thread: For this assignment you will use the Project 2 Excel Spreadsheet to answer the questions below.
Use the spreadsheet to create the graphs as described in each question and then answer the question.
Put all of your answers into a post in the Project 2 Discussion Board Forum.
This course will be utilizing the Post-First feature. You will not be able to see your classmates’ posts until after you have made your own post. This is intentional. You must use your own work for answers to questions 1–5. If something happens that leads you to want to make a 2nd post for any of your answers to questions 1–5, you must get permission... Discussion Board Project 2 Instructions...

Coefficient of Variation and Standard Deviation

1 pages (250 words)

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...Standard Deviation Submitted to, Submitted By, of the Submitted on, [June 17th,
INTRODUCTION
The average is a good measure to represent data. However, the dispersion of values signifies the authenticity of mean or average. Generally, for a highly dispersed set of values the mean is not a good representative measure.
STANDARD DEVIATION
One of the measures of dispersion is standard deviation. This most widely used measure describes average distance of each value from mean. Below is the formula for standard deviation.
The stepwise narration of the process would be,
1. Take out the difference between each value and mean by subtraction.
2. Square each calculated difference... Coefficient of Variation and...

Standard Deviation, Hypotheses, and Standard Error

2 pages (500 words)

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...Standard Deviation, Hypotheses, and Standard Error Answers: Hurlburt (2001) defines standard deviation as a number representing how scattered or how closely bunched a set of data is around the mean. It is the most commonly used measure of variability because it is claimed as the most reliable. Mathematically speaking, it is the positive square root of the average squared deviations from the mean of the distribution. By the knowledge of standard deviation, one can describe a set of data as homogeneous (closely bunched) or heterogeneous (scattered). ...

The Population Variance and Standard Deviation

2 pages (500 words)

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...Standard Deviation
Section 7.1
14. A sociologist found that in a sample of 50 retired men, the average number of jobs they had during their lifetimes was 7.2. The population standard deviation is 2.1.
a) Find the best point estimate of the population mean.
b) Find the 95% confidence interval of the mean number of jobs.
c) Find the 99% confidence interval of the mean number of jobs.
d) Which is smaller? Explain why?
Solution
a) Best point estimate of the population mean is
b) At 95% confidence interval, the confidence coefficient and the confidence interval is given by
c) At 99% confidence interval, the confidence coefficient
d) The 95% confidence... The Population Variance and...

Standard Deviation as a Risk Indicator for Investment Purposes

4 pages (1000 words)

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...Standard Deviation as Risk Indicator Standard Deviation as Risk Indicator [Institute’s Standard Deviation as Risk Indicator Introduction Risk management is an important part of our everyday lives. Having the perfect balance between risk and returns is not only an inherent part of our management of lives but also the management of financial and investment portfolios as well. Over the years, experts have come up with various portfolios in order to allow the investors and observers to determine, manage and minimize the risk associated with certain investments. Standard deviation is one of those tools, which are used widely for risk management of investment portfolios (Crouhy, Galai & Mark... ?Running Head:...

Critically discuss the use of standard deviation as a risk indicator for investment purposes

4 pages (1000 words)

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...Standard deviation is used as one of the indicators of risk of an investment such as a stock or a fund. Along with Beta, it is the one of the two widely used indicators for this purpose. Standard deviation measures the variability of an investment’s returns around its average returns over a given time period. Thus, one standard deviation implies that an investment’s returns will lie within the standard deviation limits 68% of the time. Similarly, two standard deviations imply that the returns will lie within the...

Standard deviation in portfolio management: A look at Dubai Financial Markets Stocks

6 pages (1500 words)

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...standard deviation, Treynor, and shape ration methods (Hartman and Sprenger 37). Out of all these, standard deviation remains to be the best tool in understanding financial risks of a stock portfolio. The key idea is that when measuring the standard deviation one is able to measure the volatility of the stock. A more volatile stock is one where the stock’s returns have a higher variation from the stock’s average return (Dorfman 68). It is advisable to measure standard deviation of the stock portfolios returns rather than the range because... number Introduction There are many different ways and methods available to measure risk. In most financial publications, there is the common use of alpha, beta,...

Hypothesis Testing Procedures

1 pages (250 words)

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...standard deviation, a researcher needs to consider the involved standard error. This value is important in determining confidence limits for decision making over the hypothesis to be tested and is derived from the known standard deviation. When testing hypothesis for a population whose standard... Testing hypothesis procedures Hypothesis testing is an instrumental tool to decision-making that identifies significance of relationships or changes in processes. Established significance calls for consideration of a hypothesized association in decision making while absence of significance means that the hypothesis is insignificant. When engaging in hypothesis testing procedures for the population with known...

Principles of Finance

3 pages (750 words)

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...Standard Deviation of Stock A: Standard Deviation of Stock B: (b) (i)
Expected Return on the portfolio =
Expected Standard Deviation of the portfolio
Deriving the equation between risk and return
Standard Deviation of a portfolio with an expected return of 7%
Standard Deviation of a portfolio with an expected return of 15%
(ii)
Expected Return on the portfolio =
Expected Standard Deviation of the portfolio
Deriving the equation between risk and return
Standard Deviation of a portfolio with an expected return of 7%
Standard Deviation of a portfolio with an expected return of 15%
(iii)
I will select the portfolio... , it is the portfolio which incurs smallest risk at a given level of return....

Coefficient of Variation

1 pages (250 words)

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...standard deviation or the mean deviation, the advantage of the coefficient of variation is that it can be used to compare extents of variation across samples that use different measuring units or samples that have substantially different means. For instance if there were three stores A, B and C which were located in places so that the mean weekly sales revenues were drastically different, simply comparing the standard deviations of the sales would not provide clear picture of the true differences in variability across these stores. Instead by computing the coefficient of variation for each... 1. The coefficient of variation is a relative measure of variability. Compared to absolute measures such as the...

Nutrition sciences

32 pages (8000 words)

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...standard deviation values have also been determined to find out the deviation in nutrients intake from the average values determined.
Following is the list of nutrients for which dietary intake information has been collected from the sample of university students:
S. No.
Nutrient
1
Energy (kcal)
2
Proteins (g)
3
Fats (g)
4
Saturated Fatty Acids (g)
5
Carbohydrates (g)
6
Total Sugar (g)
7
Alcohol (g)
8
Non Starch Polysaccharides (g)
9
Vitamin A (μg)
10
Thiamine (mg)
11
Vitamin C (mg)
12
Iron (mg)
13... Dietary Intake Study Dietary Intake Study Introduction This report provides a small scale research regarding the dietary intake by university students and the extent to which their dietary intakes are...

FREQUENCY DISTRIBUTIONS

3 pages (750 words)

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...standard deviation, and variance. To measure the standard deviation and the variance, one has to calculate the average of standard deviations of all the values from the mean. The below frequency distribution table shows the collected data relating to the amount of time spent on physical fitness training every day, in the form of minutes, and the frequencies.
Time spent... Introduction to Probability Brandon M. Blackmon Trident International Frequency distribution table Frequency distribution tables present data in the form of values and their frequencies. It helps in the calculation of, measures of central tendencies, for example, the mean, as well as, measures of variations including the range,...

Research Proposal Design

4 pages (1000 words)

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...standard deviation. Mean = $21,900. The formula is: = X/N. Median = $15,800. The median is found by arranging the values from lowest to highest value and choosing the middle value from an odd number of scores, or calculating the average of the two middle values from an even number of scores). Standard deviation = $21,200. Standard deviation is calculated as the square root of the variance; variance is calculated as follows, where M is the mean and N is the total number of scores.
Determine the coefficient of skewness using Pearson's method. 0.041... . This is calculated as Sk = 3( - ) / Sx where denotes mean, denotes median, and Sx denotes the sample standard...

Discussion question

1 pages (250 words)

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...Standard deviation method is useful in high variability as it is used to measure dispersion by extracting the square root. If the research requires a more sensitive, the most required variability to use is the standard deviation. The variability is extremely sensitive to change in the data, unlike the range and the interquartile variability data (Heiman and Gary 85... Discussion question Numerous various variability methods have been used to explain or describe the complex varieties. However, different variability is used differently according to the complexity of database. The following essay will discuss various variability methods recommended differentiating the high and the low variability. ...

MGM600-0803B-02 Applied Managerial Decision-Making - Phase 3 Individual Project

2 pages (500 words)

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...standard deviation of a population or sample is equal to the predetermined value of standard deviation. The test can be performed from two perspectives: either as one sided test or two sided test. The two sided test is performed against the alternative hypothesis that the actual standard deviation is greater than or less than the specified value. The one sided test concentrate only on one aspect. The chi-square test can either be one sided or two sided depending on the situation. For instance, while testing new software, we may require an understanding whether... MGM600-0803B-02 Applied Managerial Decision-Making - Phase 3 Individual Project The chi-square test is conducted to examine whether the...

Frequency Distributions

2 pages (500 words)

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...standard deviation of the mean? How many scores were within two standard deviations of the mean?
99 34 86 57 73 85 91 93 46 96 88 79 68 85 89
Ans: The mean is 77.93 and the Standard deviation is 18.38.
There were 12 observations within one Standard Dev of mean limits
There were 14 observations within two Standard Dev of mean limits
2. The scores for math test #3 were normally distributed. If 15 students had a mean score of 74.8% and a standard... deviation of 7.57, how many students scored above an 85%?
Ans: Mean=74.8 and S.D= 7.57, then z= (85-74.8) / 7.57 i.e 1.3474
Cumulative area for z score 1.3474 is 0.911 i.e. cumulative area for...

Frequency Distributions (mod 3 slp)

2 pages (500 words)

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...standard deviation, the upper limit and lower limit of each salary range are listed. After this, the mid-point of each salary range is computed. The product of midpoint of the salary and the frequency is calculated. The sum of all these products (3230) is divided by the total distribution size (20) to compute... From the data collected in Module a frequency distribution can be prepared as shown in Table Table Frequency Distribution Time (in Minutes) Frequency
81-100
1
101-120
3
121-140
0
141-160
3
161-180
8
181-200
3
201-220
2
Figure 1: Graph for Frequency Distribution
The distribution resembles a normal distribution as evidenced by the bar and line graphs depicted in Figure 1.
Now, to calculate standard ...

Memory Process Serial Position Effect

6 pages (1500 words)

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...standard deviation of 4.4. This accounts to 22.4% of all letters displayed. The mean average of recognized letters was (30.4) with standard deviation of 4.6. This means that 82.9% of all letters displayed were recognized by participants. The following graph demonstrates the recall... Introduction During our day, we are faced with situation were we must memorize different things. Scientists have been concerned to understand how weremember things. We usually try to remember things not carrying about their order or location which is called free recall (MacKewn & Goldthwaite, 2004). However, many researchers found that the position of things is a matter in remembering them which is referred to as the serial...

Dental statistics

4 pages (1000 words)

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...standard deviation.
The sample mean of a grouped data is equal to the ratio of sum of product of variable value and their corresponding frequency to the total frequency of data or sample size.
Sample mean:
Sample mean= sum of product of X & f/ sum of f
X-bar = ∑xf/ ∑f
From the above... Question: The following data are the number of decayed, missing and filled teeth (DMFT) in a sample of 30 20-year-old dental in a particular country:
S.No
Teeth missing=x
Frequency
f
xf
X2f
1
0
1
0
0
2
1
1
1
1
3
2
2
4
8
4
3
4
12
36
5
4
2
8
32
6
5
3
15
75
7
6
4
24
144
8
7
3
21
147
9
8
4
32
256
10
9
2
18
162
11
10
1
10
100
12
11
2
22
242
13
12
1
12
144
total
30
179
1347
a. Calculate the sample mean DMFT and the estimated s...

Descriptive Statistic paper

3 pages (750 words)

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...deviates with the same standard deviation.
In our case we have to series of data as follows:
A
B
MIN
2
0
MAX
20
1
RANGE
18
1
MEAN
10.3
0.43
STD DEV
18.45
0.25
POP VARIANCE
18.14
0.25
From the above data collected the column A represents high ATM usage while B represents debit card usage, the first data n high ATM usage has a mean value of 10.3 and the minimum amount is 2 and maximum amount of 20, the standard deviation is 18.45 and for this reason the data is negatively skewed
The above chart shows negative skew for the high ATM usage, this states that more of the data observations lie on the lower measures of the data; less data on the other hand lies on the higher measure... Based on your skew value...

Business stat project

2 pages (500 words)

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...deviation for age
Company
BMW
Cadillac
Lexus
Lincoln
Mercedes
Mean
45.28
61
50.96
59.5
52.24
Median
45
61
51
60
52
Mode
46
62
55
60
53
Standard deviation
4.725
3.753
6.214
4.626
7.919
Summary statistics on customers’ age identifies highest statistics with Cadillac whose mean is for example 61 and Lincoln’s mean follows this at 59.5 years. Median and mode values follow the same trend across the organizations and this supports the hypothesis that Cadillac has retained control of the older population. Cadillac also reports the lower standard deviation for the customers’ ages to show that the ages are...

CAPM theory

1 pages (250 words)
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...Standard deviation of 0.062737 if I wanted a minimum variance portfolio. The proportion which occurs in the efficient frontier ensures minimum risk that is measured by the variance of its returns and is my minimum variance portfolio. If I wanted a portfolio with maximum risk, I would choose proportion with 0 Wcoke and 1 Wmerck with portfolio return of 0.011146 and standard deviation of 0.078574. The proportions also occur on the efficient frontier and would be my maximum return portfolio with concomitant maximum risk.... Finance and Accounting October Finance and Accounting 5. If you had to choose an investment proportion in these two securities, what would you choose? Why? Explain your choice in terms...

Binomials

1 pages (250 words)

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...deviation of X. (Round your answers to two decimal places.)
mean
2.3
variance
0.81
standard deviation
0.9
2. The probability distribution of a random variable X is given.
x
-2
-1
0
1
2
P(X = x)
1/16
4/16
6/16
4/16
1/16
Compute the mean, variance, and standard deviation of X.
mean
0
variance
1
standard deviation
1
3. The probability distribution of a random variable X is given.
x
450
460
540
555
570
P(X = x)
0.2
0.1
0.4
0.2
0.1
Compute the mean, variance, and standard deviation of X. (Round your answers to two decimal places... PART A The probability distribution of a random variable X is given. x 2 3 4 P(X = x) 0.2 0.4 0.3 0 Compute the mean, variance, andstandard...

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