Author Question: Homeowners who recently bought their houses from a local developer allege that 30% of the houses ... (Read 121 times)

kaitlynndavis · **on:** Feb 26, 2023

Question 1

Heights of children entering kindergarten are normally distributed with a mean of 103 cm and a standard deviation of 1.27 cm. What is the probability that a random sample of 8 children will have an average height more than 103.5 cm?

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0.8665

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0.6517

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0.3483

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0.1335

Question 2

Homeowners who recently bought their houses from a local developer allege that 30% of the houses this developer constructs have some major defect that will require substantial repairs. To test this allegation, we randomly sample 20 houses constructed by the developer and find that two of the homes do, indeed, have some major defect. If the allegation is correct, what is the probability of observing at most two defective homes out of a random sample of 20?

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0.0256

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0.1000

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0.0300

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0.9744

ekattan2 · **Reply #1 on:** Feb 26, 2023

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