A high school teacher was interested in whether there was a difference between tenth graders and twelfthgradersin
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A high school teacher was interested in whether there was a difference between tenth graders and twelfthgradersin the number of hours they spend on TikTok. He randomly selected 15 tenth gradersand 15twelfth gradersand asked them how many hours a week they spent on TikTok. Tenth gradersreported they spent, on average, 6.2 hours per week; twelfth gradersreported they spent 5.0hours per week. Use this data to answer questions a-c to determine the power of this study:
a) If sp= 1.4, calculate g (the sample estimate of d) (1 pt).
b) What size effect is this (small, medium or large)? (1 pt)
c) Calculate ?. (2 pts)
d)If ? = .05, two-tailed, what is the power of this study? (1 pt)
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