StudentShare solutions
Triangle menu

Statistics - Essay Example

Not dowloaded yet
According to basic probability we divide the figure of favourable outcomes by the total number of possible outcomes in our sample space. If we're observing for the chance it will rain, this will be the number of days in our record that it rained divided by the total number of similar days in our record. If our meteorologist has data for 100 days with similar weather conditions, and on 80 of these days it rained (a favourable outcome), the probability of rain on the next similar day is 80/100 or 80%.
In view of the fact that a 50% probability means that an experience is as likely to happen as not, 80%, which is greater than 50%, means that it is more likely to rain than not. But what is the probability that it won't rain Keep in mind that because the favourable outcomes represent all the possible ways that an event can occur, the sum of the different probabilities must equal 1 or 100%, so 100% - 80% = 20%, and the probability that it won't rain is 20%.
The following scatter plot with a fitted line shows that there is a positive relationship b/w selected 15 student's maths and science scores. ...
represent all the possible ways that an event can occur, the sum of the different probabilities must equal 1 or 100%, so 100% - 80% = 20%, and the probability that it won't rain is 20%.


2. The table below gives the marks of 15 students in tests in 2 subjects:
Students
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Maths
29
45
27
19
39
46
25
38
39
43
49
21
38
46
37
Science
36
42
31
26
42
41
25
41
40
40
43
23
39
45
38

a. Scatter graph of the maths and science scores with best fitted line
The following scatter plot with a fitted line shows that there is a positive relationship b/w selected 15 student's maths and science scores. Part 2b will be the evidence to prove this hypothesis that student's math scores will be positively related to their science scores. Correlation coefficient (r = + 0.936) this magnitude shows that it's highly correlated and the positive sign shows that there is a positive correlation between the variables. So we conclude that as one variable increases other one will also increases.

b. Comment on the position of the line of best fit and any correlation between the scores.
Although one objective of correlation is a line fitted to the data, this line is not used to predict an unknown value of one variable when given a value of the other variable; it simply shows the relationship between the two variables. This best-fit line is the one that minimizes the sum of squared deviations between the points and the line, measured vertically (along the Y axis).
The Bivariate Correlations procedure computes Pearson's correlation coefficient. Correlations measure how variables or rank orders are related. Before calculating a correlation coefficient, screen your data for outliers (which can cause misleading results) and evidence of a linear relationship. Pearson's ...Show more

Summary

Probability as a general concept can be defined as the chance of an event occurring. In addition to being used in games of chance, probability is used in different real life fields like insurance, investments, and weather forecasting, and in various areas.
Author : conroycaterina
Statistics essay example
Read Text Preview
Save Your Time for More Important Things
Let us write or edit the essay on your topic
"Statistics"
with a personal 20% discount.
Grab the best paper

Related Essays

Statistics
licts with parents. However, current literature on the topic does not include adolescents with symptoms of depression severe enough to be involved in mental health care (Lichtwarck-Aschoff et al., 2009). Clinically depressed adolescents disengage during conflict with parents as a defense mechanism in order to reject any unpleasant or intense trigger that could represent a personal danger (Jackson et al., 2011).
4 pages (1000 words) Essay
Statistics
There is no strong recognition amongst researchers, consultants, etc., that increased job satisfaction creates improve job performance -- in fact, and improved job satisfaction can sometimes decrease job performance. For instance, you
6 pages (1500 words) Essay
Statistics
However, Jim managed to sell home with the highest price and the mean difference was significant implying that, Jim was more effective than Jenny in terms of sales. Further, it is clear that, the material used in the building of homes determines a lot whether
8 pages (2000 words) Essay
Statistics
A variable that touches every value while changing its position is called a continuous variable. The examples include temperature, height, weight and time etc. On the contrary, discrete variable does not touch every value
2 pages (500 words) Essay
Statistics
This further enhances the well being index and life and work quality in that region, thus creating a virtuous cycle. Statistical analysis of well being index
4 pages (1000 words) Essay
Statistics
I believe bias removal and the implementation of proper statistical procedures will remove the lies in the statistical procedures. I feel statistical
4 pages (1000 words) Essay
Statistics
In addition, the statistics used is very easy to understand that even an elementary student can understand. This kind of statistic used basketball is called descriptive statistics. It is
1 pages (250 words) Essay
Statistics
This means that students who drop out of school do not achieve their full potential. Thus, statistics on high school dropout is crucial to me as it enables me understand the importance of graduating. The number
1 pages (250 words) Essay
Statistics
I used to hear a lot of news talking of stock market but I was not in a position to internalize what mathematical equations were behind the determination of future stock exchange. Through statistical knowledge that I have acquired, I am now in a position to
1 pages (250 words) Essay
Statistics
by the US National Fire Protection Association, NFPA show that Americans have indeed appreciated the importance of that this device plays in ensuring their safety as 24 out of 25 of the surveyed homes have at least one fire alarm (Ahrens, 2014). This representing about 96% of
1 pages (250 words) Essay
Get a custom paper written
by a pro under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger
Your email
YOUR PRIZE:
Apply my DISCOUNT
Comments (0)
Rate this paper:
Thank you! Your comment has been sent and will be posted after moderation