Question

Conclusions A catalog sales company promises to deliver orders placed on the Internet within 3 days.​ Follow-up calls to a few randomly selected customers show that a 9090​% confidence interval for the proportion of all orders that arrive on time is 8888​%plus or minus±77​%. What does this​ mean? Are the conclusions below​ correct? Explain.
a) Between 8181​% and 9595​% of all orders arrive on time.

b) 9090​% of all random samples of customers will show that 8888​% of orders arrive on time.

c) 9090​% of all random samples of customers will show that 8181​% to 9595​% of orders arrive on time.

d) The company is 9090​% sure that between 8181​% and 9595​% of the orders placed by the customers in this sample arrived on time.

e) On 9090​% of the​ days, between 8181​% and 9595​% of the orders will arrive on time.

Answer 1

It is d

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