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At a university, the average cost of books per student has been $400 per student per semester. The Dean of Students believes that the costs are increasing and that the average is now greater than $400. He surveys a sample of 40 students and finds that for the most recent semester their average cost was $430 with a standard deviation of $80. What is the test value for this hypothesis test?
A) Write the null and alternative hypotheses B) What is the value of the test statistic C) What is the associated P value
The population standard deviation is unknown. If you assume that the population mean is 19, find the P-value corresponding to the hypothesis that the average cutthroat trout length is different from 19 (i.e. two-tail test).
for your study on the food consumption habits of teenage males you randomly select 10 teenage males and ask each how
Normal distribution has mean of 80 and standard deviation of 14. Find out the value above which 80 percent of values will occur.
Research Question- What are the associations among return on equity, return on investment, total annual revenues, and CEOs stock options awards
Post by Day 3 your one-sample ttest scenario. What would need to change in the scenario to result in the need for a two-sample ttest? Explain whether the two-sample scenario would be categorized as having independent samples or related samples and..
Find the expected value of the number of tests taken.
You do not need to collect data and actually conduct the test calculations. Rather,state the claim, define the null and alternate hypotheses, identify the test significance and the test statistic, and state the decision rule that will be used.
Scores by women on the SAT-I test are normally distributed with a mean of 998 and a standard deviation of 202. Scores by women on the ACT test are normally distributed with a mean of 20.9 and a standard deviation of 4.6.
Construct a 95% jackknife con?dence interval for the actual average air pollution index for this city and interpret.
General Motors pays for employee education. The HR director would like to conduct a study on the average GPA of employees who have used this benefit to complete their degrees using a sample of education records over the past 10 years.
a recent survey was conducted where 431 of 643 males said they thought u.s. air travel is safer now than it was prior
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