A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 760  hours. A random sample of  25 light bulbs has a mean life of  741 hours. Assume the population is normally distributed and the population standard deviation is  56 hours. At ​, a=0.02 do you have enough evidence to reject the​ manufacturer's claim? Complete parts​ (a) through​ (e).

MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is at least 760  hours. A random sample of  25 light bulbs has a mean life of  741 hours. Assume the population is normally distributed and the population standard deviation is  56 hours. At ​, a=0.02 do you have enough evidence to reject the​ manufacturer's claim? Complete parts​ (a) through​ (e). 

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