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 nequals63, find the probability of a sample mean being less than 19.9 if muequals20 and sigmaequals1.35.
Added by Miguel -Ngel O.
Step 1
- Standard error = sigma / sqrt(n) = 1.35 / sqrt(63) - sqrt(63) ≈ 7.937 - Standard error ≈ 1.35 / 7.937 ≈ 0.170 Show more…
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