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 90 % confidence interval for the proportion of all orders that arrive on time is 88 %plus or minus5 %. what does this mean? are the conclusions below correct? explain. a right parenthesis between 83 % and 93 % of all orders arrive on time. b right parenthesis 90 % of all random samples of customers will show that 88 % of orders arrive on time. c right parenthesis 90 % of all random samples of customers will show that 83 % to 93 % of orders arrive on time. d right parenthesis the company is 90 % sure that between 83 % and 93 % of the orders placed by the customers in this sample arrived on time. e right parenthesis on 90 % of the days, between 83 % and 93 % of the orders will arrive on time.

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Suarez

Business

5 October, 08:46

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 90 % confidence interval for the proportion of all orders that arrive on time is 88 %plus or minus5 %. what does this mean? are the conclusions below correct? explain. a right parenthesis between 83 % and 93 % of all orders arrive on time. b right parenthesis 90 % of all random samples of customers will show that 88 % of orders arrive on time. c right parenthesis 90 % of all random samples of customers will show that 83 % to 93 % of orders arrive on time. d right parenthesis the company is 90 % sure that between 83 % and 93 % of the orders placed by the customers in this sample arrived on time. e right parenthesis on 90 % of the days, between 83 % and 93 % of the orders will arrive on time.

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Ruben Herman · Answer 1

The correct option is;

d. The company is 90% sure that between 83% and 93% of the orders placed by the customers in this sample arrived on time

Explanation:

The result of the follow up show that at a 90% confidence level, the proportion of the deliveries that arrived on time is between 93% and 83%. That is the highest proportion the company is confident arrived on time is 93% while the lowest proportion the company is 90% confident arrived on time is 83%.

Therefore, option d. (the company is 90% sure that between 83% and 93% of the orders placed by the customers in this sample arrived on time.