Similar Tests - Assembly Time: You manufacture boxed swing sets and want to conv

Question

Similar Tests - Assembly Time: You manufacture boxed swing sets and want to convince customers that it takes less than 2 hours to assemble one. You take a sample of adults, have them assemble the swing sets, and time them. About 78% of the adults get done in just under 2 hours but the other 22% take much more than 2 hours. You are considering the two claims given below. For each claim, choose the appropriate alternate hypothesis for the test.

(a) You claim that most adults take less than 2 hours to assemble the swing set.

H1: p < 2

H1: p > 0.5    

H1: x < 2

H1: ? < 2

(b) You claim that the average assembly time is less than 2 hours.

H1: ? < 2

H1: p < 2    

H1: x < 2

H1: p > 0.5

Explanation / Answer

a) as this hypothesis is about proportion of people who take less than 2 Hours

therefore alternate hypothesis:

H1: p > 0.5

b) for this is about average value

therefore alternate hypothesis:

H1: ? < 2

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