A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 749 hours. A random sample of 28 light bulbs has a mean life of 726 hours. Assume the population is normally distributed and thepopulation standard deviation is 57 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: µ>749H3 ps749 (claim)O B. Ho p 749(claim)Ha p=749O C. H: μ= 726Ha: p#726 (claim)0 D. H0 μ 5 726O E. Ho p2749 (claim)Ο Ε Ho μ< 726 (claim)H3 p> 726 (claim)H, p<749H3: p2726

(a) Identify the null hypothesis and alternative hypothesis. O A. Ho: u>749 H us749 (claim) O B. H, µ#749(claim) OC. Ho u= 726 H, p= 749 H, u#726 (claim) O D. Ho us726 O E. Ho uz749 (claim) OF Ho: H<726 (claim) Ha p> 726 (claim) H, p<749 H p2 726

(a) Identify the null hypothesis and alternative hypothesis. O A. Ho: u>749 H us749 (claim) O B. H, µ#749(claim) OC. Ho u= 726 H, p= 749 H, u#726 (claim) O D. Ho us726 O E. Ho uz749 (claim) OF Ho: H<726 (claim) Ha p> 726 (claim) H, p<749 H p2 726

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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Question

A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 749 hours. A random sample of 28 light bulbs has a mean life of 726 hours. Assume the population is normally distributed and the
population standard deviation is 57 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: µ>749
H3 ps749 (claim)
O B. Ho p 749(claim)
Ha p=749
O C. H: μ= 726
Ha: p#726 (claim)
0 D. H0 μ 5 726
O E. Ho p2749 (claim)
Ο Ε Ho μ< 726 (claim)
H3 p> 726 (claim)
H, p<749
H3: p2726

Expert Solution

Step 1

The hypothesized mean is 749.

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