Explain about the Probability of a Particular Sample Mean.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter6: Ratio, Proportion, And Probability
Section: Chapter Questions
Problem 5CR
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Question
Explain about the
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Step 1-Introduction
Solution:
Sample mean :
Sample mean is simply the average of all the measurements in the sample. If the sample is random, then the sample mean can be used to estimate the population mean.
Central Limit theorem-
Suppose X is a random variable with a distribution that may be known or unknown with mean= and
standard deviation =
If you draw random samples of size n then as n increases, the random variable which consists of sample means,
is called sampling distribution of sample means.
sampling distribution of the mean approaches a normal distribution as n, the sample size, increases.
That is,
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