OpenStax, Introductory Statistics 2e §7.2 The Central Limit Theorem for Sums · Exercise 6 · Statistics · Sampling distributions
The Central Limit Theorem for Sums · Exercise 6
The distribution of results from a cholesterol test has a mean of 180 and a standard deviation of 20. A sample size of 40 is drawn randomly.
Find the probability that the sum of the 40 values is less than 7,000.
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Introductory Statistics 2e · §7.2 The Central Limit Theorem for Sums · Exercise 6
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