A manufacturer claims that the light bulbs that they produce have a mean lifetime of 1,200 hours and standard deviation of 400 hours. A random sample of size 50 is selected and the sample mean, , iscalculated.Let the sample mean, .be an estimator of the population mean H. Which of the following statements are true?Select one or more:O a.The distribution of is approximately normalOb.X is an unbiased estimator of uO c. The variance of is o?/n. where g? is the population variance and n is the sample size.Od.K is a consistent estimator of

A manufacturer claims that the light bulbs that they produce have a mean lifetime of 1,200 hours and standard deviation of 400 hours. A random sample of size 50 is selected and the sample mean, , i calculated.

A manufacturer claims that the light bulbs that they produce have a mean lifetime of 1,200 hours and standard deviation of 400 hours. A random sample of size 50 is selected and the sample mean, , i calculated.

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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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

A manufacturer claims that the light bulbs that they produce have a mean lifetime of 1,200 hours and standard deviation of 400 hours. A random sample of size 50 is selected and the sample mean, , is
calculated.
Let the sample mean, .be an estimator of the population mean H. Which of the following statements are true?
Select one or more:
O a.
The distribution of is approximately normal
Ob.
X is an unbiased estimator of u
O c. The variance of is o?/n. where g? is the population variance and n is the sample size.
Od.
K is a consistent estimator of

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