Thursday
December 18, 2014

Homework Help: statistics

Posted by Dylan on Wednesday, April 24, 2013 at 4:31pm.

Your mail-order company advertises that it ships 95% of its orders within three working days. You select an SRS of 100 of the 5000 orders received in the past week for an audit. The audit reveals that only 91 of these orders were shipped on time.

A) What is the sample proportion of orders shipped on time?

B) If the company really ships 95% of its orders on time, what is the probability that the proportion in an SRS of 100 orders is as small as the proportion in your sample or smaller? (Use a normal approximation, but be sure to justify the standard deviation and approximation first.)

C) A critic says, "Aha! You claim 95% but in your sample the on-time percentage is lower than that. So the 95% claim is wrong." Does your probability calculation in (b) support or refute the 95% claim? Explain.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

statistical analysis - New Process, Inc., a large mail-order supplier of women’s...
statistics - Chicken Delight claims that 90 percent of its orders are delivered...
Statistics - DM Co. sells computer parts by mail. The company claims that at ...
statistics - The average time in data to process orders received by a metal ...
Statstistics - Chicken Delight claims that 91% of its orders are delivered ...
Statistics - The web based company Oh Baby! has a goal of processing 95% of its ...
Statistics - A mail order company has sent a questionnaire to each of its ...
math - a catering company has 15 customers orders during its first month. for ...
Statistics PLEASE HELP ME! - Collina’s Italian Café in Houston, Texas, ...
Math - Each day Danny prepares pies for dessert.He slices each pie into 8 ...

Search
Members