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A catalog sales company promises to deliver orders placed on the Internet within 3 days.? Follow-up...

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Question

Statistics

A catalog sales company promises to deliver orders placed on theInternet within 3 days.? Follow-up calls to a few randomly selectedcustomers show that a 90?% confidence interval for the proportionof all orders that arrive on time is 88?% ±4?%. What does this?mean? Are the conclusions below? correct? Explain.

a) Between 84?%
and 92?%
of all orders arrive on time.

b)

90?% of all random samples of customers will show that 88?%

of orders arrive on time.

c)

90?% of all random samples of customers will show that 84?%

to 92?%
of orders arrive on time.

d)

The company is 90?%
sure that between 84?%
and 92?%
of the orders placed by the customers in this sample arrived ontime.

e)

On 90?%
of the? days, between 84?%
and 92?%
of the orders will arrive on time.

Answer & Explanation Solved by verified expert
4.1 Ratings (859 Votes)
aNot correctExplanation90 Confidence Interval is 884 means On 90 ofthe days between 84 and 92 of the orders will arrive    See Answer
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