OpenStax, Statistics §7.3 Using the Central Limit Theorem · Exercise 45 · Statistics · Sampling distributions
Using the Central Limit Theorem · Exercise 45
For each problem, wherever possible, provide graphs and use a calculator.
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, what is the probability that the sample mean scores will be between 85 and 125 points?
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Statistics · §7.3 Using the Central Limit Theorem · Exercise 45
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