Question

A research firm tracks the average highway speed of 30 drivers driving home on Day 1. For the next 10 days, the drivers are given two cups of coffee 1 hour before the drive home. On the 10th day, the average highway speed is measured again. Does this study involve dependent or independent samples? You are interested in knowing if there is a statistical difference in driving speeds between Day 1 and Day 10. Which statistical test would be appropriate? Why?

Answer 1

1. This investigation includes Dependent Samples on the grounds that every driver is tried on two occassions for a similar ward variable for example normal average speed.
2. We should utilized Paired-t-test (Two example subordinate t-test) since this investigation is a case of "inside subject" or "rehashed measures" statistical test. Combined - t-test is the most fitting test for this sort of situation where we need to look at normal of ward variable between two gatherings which are identified with one another.