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12.4 Exercise 25

Avg difficulty 2.5

Are the means for the final exams the same for all statistics class delivery types? the table shows the scores on final exams from several randomly selected classes that used the different delivery types.

Online Hybrid Face-to-Face
72 83 80
84 73 78
77 84 84
80 81 81
81 86
79
82

Assume that all distributions are normal, the four population standard deviations are approximately the same, and the data were collected independently and randomly. Use a level of significance of 0.05.

OpenStax Introductory Business Statistics 2e, 12.4 Facts About the F Distribution, exercise 25

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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.