## A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled fi

Question

A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken. You are given the following information.

Today Five Years Ago

x 82 88

σ2 112.5 54

n 45 36

The standard deviation of the difference between the means of the two populations is ______.

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Math
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2021-09-15T14:13:42+00:00
2021-09-15T14:13:42+00:00 1 Answer
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## Answers ( )

Answer:The standard deviation of the difference between the means of the two populations is2.Step-by-step explanation:The given table :

Today Five years ago

Let A denotes the scores from students enrolled today and B denotes the scores from students enrolled five years ago.

Then, the standard deviation of the difference between the means of the two populations would be :-

Hence,

the standard deviation of the difference between the means of the two populations is2.