AI Tutor
Back to 10.1 Two Population Means with Unknown Standard Deviations

10.1 Exercise 2

Avg difficulty 2.5

Two samples are shown in the table. Both have normal distributions. The means for the two populations are thought to be the same. Is there a difference in the means? Test at the 5 percent level of significance.

Sample Size Sample Mean Sample Standard Deviation
Population A 25 5 1
Population B 16 4.7 1.2

OpenStax Statistics, 10.1 Two Population Means with Unknown Standard Deviations, exercise 2

AI Tutor

Adapted from Statistics © 2022 Rice University. Licensed under CC BY 4.0. Source: Statistics. Imported at revision 7dea80a.