Question

A sporting goods store believes the average age of its customers is 38 or less. A random sample of 39 customers years. Using a = 0.01, complete parts a and b below. a. Does the sample provide enough evidence to refute the age claim made by the sporting goods store? Determine the null and alternative hypotheses. Нор Hyu The z-test statistic is (Round to two decimal places as needed.) The critical z-score(s) is(are) (Round to two decimal places as needed. Use a comma to separate answers as needed.) Because the test statistic the null hypothesis. b. Determine the p-value for this test. The p-value is (Round to three decimal places as needed.)

Answer 1

a. Mo: M C 38 iel Average age is 38 or INS Hy of customers less ) l > 38 eclaim) | Right tecil 2- Sokatistic -ll *4011 ELSA 40.1- 38 9 1.457 1:46 critical 2 score ze (alph = 0.01) 1.28 for right tail Test stat isti 1.46 ? critical z-score So, he Reject the nulll hypothesis

As att hyb. - p (2) 1:46) "tailers (this is right b) P-value 0.5-Plo L 221146) Zub 17 0.5-0.4279 € osx 0.5 0.0721 0-072 Lusing Hormal tahle