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?

Claim: The population proportion is less than 0.25. Fill in the missing comparison operator: =, , =, < or >. H1: ρ ___ 0.25

A researcher claims that less than 35% of students text while driving. A random sample of n = 500 students gives p̂ = 0.31. Use α = 0.01. Give the final conclusion about the claim: supported or not supported. (answer with “supported” or “not supported”)

Write the missing complementary hypothesis exactly. Use mu for mean, p for proportion, sigma for std deviation, and sigma2 for variance. Use operators: =, , =, < or >. If H1: μ > 18, then H0 is:

For a right-tail large-sample mean test with α = 0.05, which critical value is correct?

In a two-tail test with α = 0.10, how much alpha is in each tail?

Which symbol represents a population variance?

If α = 0.01, what confidence level does this correspond to?

Write the missing complementary hypothesis exactly. Use mu for mean, p for proportion, sigma for std deviation, and sigma2 for variance. Use operators: =, , =, < or >. If H0: ρ = 0.62, then H1 is: