# Answer and Steps to Statistics problem

*label*Statistics

*timer*Asked: Apr 29th, 2015

**Question description**

Llantas Inc. claims that the average life of a certain tire is greater or equal than 25,000 miles under normal driving conditions. A random sample of 16 tires is tested. The mean of the sample is 24,000 miles and the standard deviation of the population is 4,000 miles. Use alpha = 0.05.

- State
the hypotheses H
_{0}and H_{1}. - Compute the test statistic to utilize.
- Identify if the test is a two-tail or a one-tail-test (draw the reject/fail-to-reject zones with the critical value(s)).
- Using any approach (Critical Value or p-value), what is your conclusion about the null hypothesis?