1. The quality control manager at a light bulb factory needs to estimate the mean life of a newtype of light bulb. The population standard deviation is assumed to be 60 hours. A randomsample of 32 lights shows a sample mean life of 490 hours. Construct and explain a 95%confidence inverval estimate of the population mean life of the new light bulb.2. A survey of first time home buyers found that the sample mean annual income was $46,300.Assume that the survey used a sample of 28 first time home buyers and that the samplestandard deviation was $1,100. Compute and explain a 90% confidence interval estimate ofthe population mean.3. A telphone poll of 850 American adults asked "where would you rather go i your spare time?One response by 255 adults, was "the mall'. Compute and explain a 98% confidence intervalestimate of the proportion of all American adults would respond "the mall".4. For purpose #1l above size sample would be needed to achieve a margin of error of 15 hoursor less?

As per our guidelines we are suppose to do only one questionGivensample size(n)=32sample…

1. The quality control manager at a light bulb factory needs to estimate the mean life of a new type of light bulb. The population standard deviation is assumed to be 60 hours. A random sample of 32 lights shows a sample mean life of 490 hours. Construct and explain a 95% confidence inverval estimate of the population mean life of the new light bulb.

1. The quality control manager at a light bulb factory needs to estimate the mean life of a new type of light bulb. The population standard deviation is assumed to be 60 hours. A random sample of 32 lights shows a sample mean life of 490 hours. Construct and explain a 95% confidence inverval estimate of the population mean life of the new light bulb.

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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