Question 11You are studying the difference in tooth growth between the left and right incisors of 11 rats. Select the answer that most accurately describes the null hypothesis (Ho) and the alternative hypothesis (H1) for this research question.
OHO: population mean tooth growth of right incisor = population mean tooth growth of left incisor
H1: population mean tooth growth of right incisor DOES NOT = population mean tooth growth of left incisor
OHO: sample mean tooth growth of right incisor for these 11 rats = sample mean tooth growth of left incisor for these 11 rats
1
H1: sample mean tooth growth of right incisor for these 11 rats DOES NOT = sample mean tooth growth of left incisor for these 11 rats
O HO: population mean tooth growth of right incisor = population mean tooth growth of left incisor
H1: population mean tooth growth of right incisor < population mean tooth growth of left incisor
O HO: population mean tooth growth of right incisor = population mean tooth growth of left incisor
H1: population mean tooth growth of right incisor > population mean tooth growth of left incisor
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Question 7
Question 7 of 14
5 points Save Ans
You are a swimming coach and want to know if your weight-lifting training program is working. You randomly select 12 swimmers to participate in the weight-lifting and the other 15 swimmers just do the normal pool workouts. Then you analyze each group’s average time to swim 200m. In qq plots of each sample, you see that the data line up with the z-scores pretty well, forming a straight line. Choose
the best type of test of two means to assess this research question.
O One-sided Mann-Whitney U test
O One-sided unpooled variance t-test
O One-sided paired t-test
○ Two-sided unpooled variance t-test
○ Two-sided Mann Whitney U test
O One-sided pooled variance t-test
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LG
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Question 6
With a mu = 25 and a sigma = 10, the Pr(Y < 20) is bigger than the Pr( Y < 20)
● True
O False
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