An aquaculture farm takes water from a stream and returns it after it has circulated through the fish tanks. The owner thinks that, since the water circulates rather quickly through the tanks, there is little organic matter in the effluent. To find out if this is true, he takes some samples of the water at the intake and other samples downstream the outlet and tests for Biochemical Oxygen Demand (BOD)…
It is a hypothesis which states that there is no difference between the procedures and is denoted by H0. The following test of hypothesis can be conducted from the table above:
Test Statistic: It is the random variable X whose value is tested to arrive at a decision. The Central Limit Theorem states that for large sample sizes (n > 30) drawn randomly from a population, the distribution of the means of those samples will approximate normality, even when the data in the parent population are not distributed normally. A z statistic is usually used for large sample sizes (n > 30), but often large samples are not easy to obtain, in which case the t-distribution can be used. The population standard deviation s is estimated by the sample standard deviation, s.
Rejection Region: It is the part of the sample space (critical region) where the null hypothesis H0 is rejected. The size of this region is determined by the probability (a) of the sample point falling in the critical region when H0 is true. a is also known as the level of significance, the probability of the value of the random variable falling in the critical region. Also it should be noted that the term "Statistical significance" refers only to the rejection of a null hypothesis at some level a. It implies only that the observed difference between the sample statistic and the mean of the sampling distribution did not occur by chance alone.
The critical t value is obtained according to the degrees of freedom
The resulting t test values are shown in this table:
t-test: Two-Sample Assuming Equal Variances
Mean 6.6539 8.6874
Variance 0.2124 0.2988
Observations 10 10
Pooled Variance 0.2556
Hypothesized Mean Difference 0
Degrees of freedom ...
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(Hypothesis Testin Paper Essay Example | Topics and Well Written Essays - 1000 Words)
“Hypothesis Testin Paper Essay Example | Topics and Well Written Essays - 1000 Words”, n.d. https://studentshare.net/miscellaneous/303745-hypothesis-testin-paper.
It seems that, as a result of the 9/11 attack there is a considerable rise in airline security. In order to prove this hypothesis, the data collection method is used. The first step is to identify the new legislations regarding security that took birth as a result of the attack.
It means income is the element that shows the purchasing power of people. The relationship between income, sex and marital status are explored through items that are related to morale and life satisfaction, sex and marital status have significant influence on life satisfaction above a poverty level but these variables are insignificant below the poverty level.
In a mathematical interpretation of this hypothesis, the researcher uses an equal sign to indicate no relationship. This hypothesis is signified by H0. It is the hypothesis that the researcher aims at changing by testing the alternative hypothesis
An aquaculture farm takes water from a stream and returns it after it has circulated through the fish tanks. The owner thinks that, since the water circulates rather quickly through the tanks, there is little organic matter in the effluent. To find out if this is true, he takes some samples of the water at the intake and other samples downstream.
The null hypothesis is stated to be true unless disapproved by the alternative hypothesis. Alternative hypothesis on the other hand is the hypothesis that there are random influences on the observation. Acceptance of the null hypothesis automatically leads to the
During hypothesis testing the researcher allows themselves a confidence level as they are not 100% sure of the event happening (John, 2007).
Hypothesis testing is an essential part of our decision-making procedure that makes individual to anticipate. As a tutor in
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