Discussion post reply, reply to bold. 200 words

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Discussion post reply, reply to bold. 200 words

Initial post

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?



Reply

After reviewing the details in this case an example of dependant sample because of the variables that were brought. The initial measurement took a sample data of 30 drivers driving on the highway to measure the average speed was one variable, but later the data was taken from drivers that were given coffee. One type of dependent sample is characterized by a measurement followed by an intervention of some kind and the another measurement (Lind,D.A., Marchal, W.D., Whaten, S.A. 2015). According to Lind,D.A., Marchal, W.D., Whaten, S.A. (2015) this could be called a “before” and “after” study. This is the research I used to conclude that this case was an example of a dependant sample.

The type of t-test I would use in this situation is the comparing dependent and independent samples.

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