56 Paired or not In each of the following scenarios determin

5.6 Paired or not? In each of the following scenarios, determine if the data are paired.

(a) We would like to know if Intel

Solution

In Cases (a) and (c) data are taken from independent samples so we use difference of means yest.

Where as in case (b) paired data is taken for same sample element and thus we use paired t- test .