Author Question: A large university is interested in learning about the average time it takes students to drive to ... (Read 55 times)

codyclark · **on:** Feb 14, 2020

Question 1

A random sample of n observations, selected from a normal population, is used to test the null hypothesis H₀: σ² = 155. Specify the appropriate rejection region.
H_a: σ² > 155, n = 25, α = .10
◦ χ² > 15.6587
◦ χ² > 34.3816
◦ χ² > 36.4151
◦ χ² > 33.1963

Question 2

A large university is interested in learning about the average time it takes students to drive to campus. The university sampled 51 students and asked each to provide the amount of time they spent traveling to campus. The sample results found that the sample mean was 23.243 minutes and the sample standard deviation was 20.40 minutes. Find the rejection region for determining if the population standard deviation exceeds 20 minutes. Use α = 0.05.
◦ Reject H₀ if χ² > 71.4202
◦ Reject H₀ if χ² > 67.5048
◦ Reject H₀ if z > 1.645
◦ Reject H₀ if χ² > 34.7642

mcinincha279 · **Reply #1 on:** Feb 14, 2020

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