Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 764 hours. A random sample of

image text in transcribed
A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 764 hours. A random sample of 28 light bulbs has a mean life of 737 hours. Assume the population is normally distributed and the population standard deviation is 62 hours. At a = 0.02, do you have enough evidence to reject the manufacturer's claim? Complete parts (a) through (e). (a) Identify the null hypothesis and alternative hypothesis. O A. Ho: H 2 764 (claim) O B. Ho: HS737 O C. Ho: H = 737 Ha: H 737 (claim) Ha: H # 737 (claim) O D. Ho: H # 764(claim) O E. Ho: H 764 Ha: H = 764 Ha: H 2 737 Ha: H s 764 (claim) (b) Identify the critical value(s). Use technology. (Use a comma to separate answers as needed. Round to two decimal places as needed.) Identify the rejection region(s). Choose the correct answer below. O A. O B. O C. Fail to reject Ho. Fail to reject Ho Fail to reject Ho Reject Ho. Reject Ho- Reject Ho - Reject Ho- (c) Identify the standardized test statistic. Use technology. z=(Round to two decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis, and (e) interpret the decision in the context of the original claim. O A. Reject Ho- There is sufficient evidence to reject the claim that mean bulb life is at least 764 hours. O B. Reject Ho- There is not sufficient evidence to reject the claim that mean bulb life is at least 764 hours O C. Fail to reject Ho. There is not sufficient evidence to reject the claim that mean bulb life is at least 764 hours. O D. Fail to reject Ho. There is sufficient evidence to reject the claim that mean bulb life is at least 764 hours. Next

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Variational Inequalities And Frictional Contact Problems

Authors: Anca Capatina

1st Edition

3319101633, 9783319101637

More Books

Students also viewed these Mathematics questions

Question

discuss the arguments for and against CSR programmes

Answered: 1 week ago