A commercial for a manufacturer of household appliances claims that only 3% of all its products require a service call in the first year. A consumer protection association wants to check this claim and so surveys 400 households that recently purchased one of the company's appliances. What is the probability that there is a difference of at most 0.4% between the sampled proportion of appliances that require a service call within the first year and the proportion claimed by the manufacturer? 00.68 00.47 00.36 00.01 00.32

MATLAB: An Introduction with Applications
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A commercial for a manufacturer of household appliances claims that only 3% of all its products require a service
call in the first year. A consumer protection association wants to check this claim and so surveys 400 households
that recently purchased one of the company's appliances.
What is the probability that there is a difference of at most 0.4% between the sampled proportion of appliances
that require a service call within the first year and the proportion claimed by the manufacturer?
00.68
00.47
00.36
00.01
00.32
What is the probability that more than 97% of the sample appliances do not require a service call within the first
year?
O None of the other options give the correct probability.
0 1
0.03
Transcribed Image Text:A commercial for a manufacturer of household appliances claims that only 3% of all its products require a service call in the first year. A consumer protection association wants to check this claim and so surveys 400 households that recently purchased one of the company's appliances. What is the probability that there is a difference of at most 0.4% between the sampled proportion of appliances that require a service call within the first year and the proportion claimed by the manufacturer? 00.68 00.47 00.36 00.01 00.32 What is the probability that more than 97% of the sample appliances do not require a service call within the first year? O None of the other options give the correct probability. 0 1 0.03
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