Sigman Corporation makes batteries that are used in highway signals in rural areas. The company managers claim

Question:

Sigman Corporation makes batteries that are used in highway signals in rural areas. The company managers claim that the median life of a battery exceeds 4,000 hours. To test this claim, they have selected a random sample of n = 12 batteries and have traced their life spans between installation and failure. They obtained the following data:

1,973 4,838 3,805 4,494 4,738 5,249 4,459 4,098 4,722 5,894 3,322 4,800

a. State the appropriate null and alternative hypotheses.

b. Assuming that the test is to be conducted using a 0.05 level of significance, what conclusion should the managers reach based on these sample data?

Be sure to examine the required normality assumption.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question

Business Statistics

ISBN: 9781292220383

10th Global Edition

Authors: David Groebner, Patrick Shannon, Phillip Fry

Question Posted: