A bookstore claims that students spend, on average, exactly $500 on textbooks per semester. A random sample of n=100 students has x-bar=$512 and s=$60. Use alpha=0.05. Give the final conclusion about the claim: supported or not supported. (answer with “supported” or “not supported”)

A right-tail test has critical value 2.326 and TS = 2.500. What is the decision? (answer with “reject H0” or “fail to reject H0”)

A claim involves p = 0.40. A sample of n = 100 gives p̂ = 0.46. What is the test statistic?

A survey analyst claims that more than 60% of adults prefer Brand A. A random sample of n = 400 adults gives p̂ = 0.64. Use α = 0.05. Give the final conclusion about the claim: supported or not supported. (answer with “supported” or “not supported”)

A bike-light company claims that the standard deviation of battery life is less than 2 hours. A random sample of n = 25 lights has sample standard deviation s = 1.5 hours. Use α = 0.05. Give the final conclusion about the claim: supported or not supported. (answer with “supported” or “not supported”)

A sample has n = 26, sample standard deviation s = 4, and claimed σ = 5. What is the chi-square test statistic?

A researcher claims H1: ρ > 0.45. The test fails to reject H0. If this decision is incorrect, what type of error occurred? (answer “Type 1” or “Type 2”)

A hypothesis test involves a population mean with n = 45. Which Excel function should be used for the critical value according to Module 6?

A company claims μ > 5. A sample has x̄ = 5.2, but the test result is fail to reject H0. What should be concluded?

A mean hypothesis test has n = 31. Which critical-value distribution is used?