CAIE S2 2023 November — Question 1

Exam BoardCAIE
ModuleS2 (Statistics 2)
Year2023
SessionNovember
TopicLinear combinations of normal random variables
TypeSingle normal population sample mean
1 A random variable \(X\) has the distribution \(\mathrm { N } ( 410,400 )\).
Find the probability that the mean of a random sample of 36 values of \(X\) is less than 405 .
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