In: Statistics and Probability
The population mean and standard deviation are given below. Find the required probability and determine whether the given sample mean would be considered unusual. For a sample of n= 69, find the probability of a sample mean being less than 23.3 if m= 23 and sigma =1.17.
The population mean and standard deviation are given below. Find the indicated probability and determine whether a sample mean in the given range below would be considered unusual. If convenient, use technology to find the probability.
For a sample of n =31, find the probability of a sample mean being less than 12,750 or greater than 12753 when μ =12,750 and σ =2.3
a)
The answer is: 0.983410211686389
Using excel formula: =NORM.DIST(23.3,23,1.17/8.30662386291807,TRUE)
We will use excel to solve the problem:
b)
The answer is 0.50
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