Let’s review the design of the study.

a. Explain why this was an experiment and not an observational study.

b. Did Mr. Starnes use a completely randomized design or randomized block design? Why do you think he chose this experimental design?

c. Explain the purpose of the random assignment in the context of the study.

Here are the data from Mr. Starnes’s experiment. For each subject, the time to perform the two tasks is given to the nearest second.

Does the color in which words are printed affect your ability to read them? Do the words themselves affect your ability to name the color in which they are printed? Mr. Starnes designed a study to investigate these questions using the 16 students in his AP® Statistics class as subjects. Each student performed the following two tasks in random order while a partner timed his or her performance: (1) Read 32 words aloud as quickly as possible, and (2) say the color in which each of 32 words is printed as quickly as possible. Try both tasks for yourself using the word list given.

Transcribed Image Text:

Subject Words Colors Subject Words Colors 1 13 20 10 16 2 10 21 10 9 13 15 22 11 11 11 4 12 25 12 17 26 5 13 17 13 15 20 6 11 13 14 15 15 7 14 32 15 12 18 8 16 21 16 10 18 3.