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A sample survey interviews SRSs of 500 female college students and 550 male college students. Each student is asked if he or she worked for pay last summer. In all, 410 of the women and 484 of the men say "Yes".Take pM and pF to be the proportions of all college males and females who worked last summer. We conjectured before seeing the data that men are more likely to work. The hypotheses to be tested are..
A. H0: pM = pF versus Ha: pM ≠ pF .B. H0: pM = pF versus Ha: pM > pF .C. H0: pM = pF versus Ha: pM < pF .
Each home was 24 and the standard deviation of the sample was 5 people. Develop a 98 percent confidence interval for the population mean.
What are the theoretical parameters for the sampling distribution based on these 40 trains? Assume you are dealing with an infinite population of trains.
Class consists of 55% women, and 45% men 10% of the women smoke and 20% of the men smoke, what is the probability that a randomly selected smoker is female?
What percentage of the variation in their scores on the second round can be explained by their scores on the first round?
Sally wanted to build a multiple regression model based on advertising expenditures and A coffee business price index. Based on the selection of all normal values she obtained the following:
What is the value of the test statistic and decision? Show step by step on how you obtained your final answer.
Explain the use of normal probability plot to evaluate whether a set of data is normally distributed? Please discuss in detail.
Identify the null hypothesis, alternative hypothesis, test statistic, P-value and conclusion about the null hypothesis. Use the P-value method.
Carry out a significance test for the hypothesis that the two tests have the same population mean. Give the P-value and state your conclusions.
If the sample mean is 15.2 oz. and the sample standard deviation is 0.40 oz., find the 95% confidence interval of the true mean.
Given this information we could use a Z test for two independent means and conclude that indeed the sales are different when the soup is a featured item.
Determine the p-value for this test. Is there sufficient evidence to justify the rejection of H0 at the "alpha" level of 0.01? Please explain your answer.
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