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T-test Assignment

1. A researcher is interested in the effects of cardio exercise on memory. Half of the participants jog on the treadmill for 15 minutes while the other half sits quietly. At the end of the 15 minutes, participants are shown a list of 20 words and then asked to write down as many as they can remember (memory).

a. Write a directional hypothesis: b. Write a non-directional hypothesis: c. What type of specific t-test do you have to conduct to test your hypothesis?

2. There was a significant difference, t(20)=5.78, p=0.024, between the number of words remembered between the group that jogged (M=11, SD=2) and the group that sat quietly (M=17, SD=1.5).

a. Was your directional hypothesis supported? Why or why not?

b. Was your non-directional hypothesis supported? Why or why not?