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There are several assumptions for the use of an independent samples t test. State each of these and the implications should these assumptions be violated. Is it possible for a p value to equal 0? Why or why not?
There are several indices on effect sizes for independent samples t tests. Describe three of these and when one might be used over the others. Next, given a situation in which a research reports a large eta squared effect size (eta squared = .64), why might their reported t value be small and not statistically significant? What may be inference from such a situation? Indicate and provide examples of three of the factors that influence the size of t.
State the null and research hypotheses in words and in symbols, then conduct the hypothesis test, and report the results in writing.
Draw a picture of the sampling distribution of H, the highest number each day, and compare it to the equivalent picture for the Cash 5 game, shown in Figure. Do you expect them to be similar? Are they?
Does the above experiment suggest that the proportion of boys who grow out of asthma in their teenage years is 0.10 or more than that of girls?
The following data show the advertising expenses (expressed as a percentage of total expenses) and the net operating profits (expressed as a percentage of total sales) in a random sample of six drugstores:
Suppose the claim is true: The actual proportion of defectives is p 5 0.02. What is the probability that the shipment will be rejected?
Compare and contrast the PLO/Fatah with Hamas. How do they compare to other secular nationalist and fundamentalist groups under review in this class.
Is there sufficient statistical evidence at the 10% significance level to conclude that the churn rate in the telecommunications industry exceeds 15%? Perform a hypothesis test for a single proportion and report the findings.
Purkerson, Smith, and Traynor have operated a bookstore for a number of years as a partnership. At the beginning of 2015, capital balances were as follows:
a researcher reported a correlation of 1.25 between an iq test and grades in epy 6214. which one of the following
(a) State the null and the alternative hypothesis in this case. Define (in words) the parameters of interest in this case.
it has been shown that people drive 5 - 10mph faster than the posted speed limit on a highway. it has been thought that
No difference (P = 0.576) was found between the earnings of black and white students." Explain both of these conclusions, for the effects of sex and of race.
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