Two Population Means with Known Standard Deviations · Try It 2
The average age of 10 professors selected randomly in university A is 46.672 with a standard deviation of 8.53. The average age of 10 professors selected randomly in university B is 47.531 with a standard deviation of 7.83.
Does the data indicate that university A has older professors than university B, on average? Test at a 5% level of significance.
OpenStax, Introductory Statistics 2e · §10.2 Two Population Means with Known Standard Deviations · Try It 2
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