Textbook ExpertVerified Tutor
13 Nov 2021
Given information
Given that, a typical adult has an average IQ score of 105 with a standard deviation of 20. If 20 randomly selected adults are given an IQ test, we have to find the probability that the sample mean scores will be between 85 and 125 points.
Step-by-step explanation
Step 1.
According to the given information we have,
Then
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