An analyst has a set of normally distributed intervally scaled data resulting from two observations on the same sample of subjects,and he wishes to investigate if there is any difference in these two means.The appropriate statistical procedure is
A)z-test for difference in two means.
B)Analysis of variance.
C)Paired sample t-test.
D)Chi-square goodness-of-fit test.
E)Regression analysis.

Question

Quizplus · Accepted Answer

The appropriate statistical procedure for comparing two means from the same sample is the paired sample t-test. This test is used when the data is normally distributed and the two observations are dependent or related to each other. Therefore, the correct choice is (C) Paired sample t-test. Choices A, B, D, and E are not applicable in this case.

An Analyst Has a Set of Normally Distributed Intervally Scaled