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Back to 10.5 Two Population Means with Known Standard Deviations

10.5 Exercise 4

Avg difficulty 2.5

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 Business Statistics 2e, 10.5 Two Population Means with Known Standard Deviations, exercise 4

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Adapted from Introductory Business Statistics 2e © 2023 Rice University. Licensed under CC BY 4.0. Source: Introductory Business Statistics 2e. Imported at revision 50ec917.