A company that manufactures light bulbs claims that its light bulbs last an average of 1,150 hours. A sample of 25 light bulbsmanufactured by this company gave a mean life of 1067 hours and a standard deviation of 137 hours. A consumer group wants to testthe hypothesis that the mean life of light bulbs produced by this company is less than 1,150 hours. The significance level is 5%. Assumethe population is normally distributed.What is the critical value of t?O-2.787O-1.711O-1.704-2.797What is the value of the test statistic, t, rounded to three decimal places?What is the p-value for this hypothesis test, rounded to four decimal places?Should you reject or fail to reject the null hypothesis in this test?Does the data provide evidence to contradict the company's claim about the average lifetime of their light bulbs?

Solution According to the guidelines we solve only three subparts

Answered: manufactured by this company gave a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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