If your null and alternative hypothesis are: H0:μ=40�0:�=40 H1:μ<40�1:�<40 Then the test is: right tailed two tailed left tailed

answer 3

A certain magazine stated that the mean time for a Ford Mustang to go from 0 to 60 miles per hour is 4.1 seconds. (a) If you want to set up a statistical test to challenge the claim of 4.1 seconds, what would you use for the null hypothesis? 04.1 O = 4.1 (b) The town of Leadville, Colorado, has an elevation over 10,000 feet. Suppose you wanted to test the claim that the average time to accelerate from 0 to 60 miles per hour is longer Leadville (because of less oxygen). What would you use for the alternate hypothesis? OH 4.1 OM 4.1 O = 4.1 (c) Suppose you made an engine modification and you think the average time to accelerate from 0 to 60 miles per hour is reduced. What would you use for the alternate hypothesis? OH> 4.1 O μ< 4.1 OH 4.1. (d) For each of the tests in parts (b) and (c), would the P-value area be on the left, on the right, or on both sides of the mean? O left; both O right; left O left; right O both; left

Use the following information for Questions 19-21. Teresa works at a medium-sized doctor's office and notices that appointment times are approximately normally distributed with mean 25 minutes and standard deviation 10 minutes. A patient complains that the wait times are too long and that her average wait time is much longer than 25 minutes. Teresa decides to conduct a test with a = 0.05 and the following hypotheses Ho: H=25 vs. Ha:μ> 25 Teresa randomly selects 25 appointments and records their times and finds their mean. The P-value of the test of the null hypothesis is O the probability the null hypothesis is false. O the probability, assuming the null hypothesis is true, that the test statistic will take a value at least as extreme as that actually observed. O the probability, assuming the null hypothesis is false, that the test statistic will take a value at least as extreme as that actually observed. O the probability the null hypothesis is true.