3. You decide to repeat the previous experiment, but this time recruit only 8 pa

Question

3. You decide to repeat the previous experiment, but this time recruit only 8 participants and record their reaction time twice: First, you measure each person's reaction time after 8 hours of coffee drinking. Then each participant sleeps for 8 hours and then you measure their reaction times a second time. Below are the reaction times for each individual. By coincidence, the conditions differ by the same amount as in the previous experiment Coffee Sleep 268 258 268 263 261 273 260 271 266 255 267 261 259 271 258 269 a. What type of t-test is appropriate for this hypothesis test? Possible choices are: single sample t-test, independent-samples t-test, and paired-samples t-test [1 MARK] b. State the HA and Ho for a test of whether the two experimental conditions differ 12 MARKS]

Explanation / Answer

a) Paired Sample t-test

b)

c) DF = 8 - 1 = 7

d)

t-critical = 2.3646

e)

f) Reject null hypothesis

g)

Null Hypothesis Alternate Hypothesis H0: 1 - 2 = 0 Ha: 1 - 2 not equals to 0

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