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Question 1: Use standard error and 95% confidence limits to compare the heights of females and the heights
of males in a classroom.
State your null hypothesis:

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Height of Height of
females males
(inches) (inches)
65 76
63 78
59 73
64 60
69 82
68 74…

Page 2

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Question 2: Use standard error and 95% confidence limits to compare how many words people can write in a
minute using their dominant and their nondominant hand.
State your null hypothesis:

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Dominant Nondominant
hand hand
30 12
26 16
23 10
34 14
31 16
27 11…

Page 3

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Question 3: Use standard error and 95% confidence limits to compare the lengths of shells on two different
beaches.
State your null hypothesis:

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Length of Length of
shells on shells on
beach 1 beach 2
(mm) (mm)
35 36
46 51
32 37
47 49
52 40…

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