### Percentage of defective items in the shipment

Assignment Help Other Subject
##### Reference no: EM13977604

1. A university official wants to estimate, with 99% confidence and within \$2, the average amount that members of fraternities and sororities spend at local restaurants during the first week of the semester. If the total fraternity/sorority membership is 300 people, how many members should be included in the sample? Use (and explain) your own estimate for the population standard deviation.

2. A quality-management supervisor believes that no more than 5% of the items in a recent shipment of 2000 are defective. If she wishes to determine, within 1 percentage point and with 99% confidence, the percentage of defective items in the shipment, how large a simple random sample would be necessary?

#### Determine the number of trucks

Using (and explaining) your own estimate for the population standard deviation, determine the number of trucks on which the company should install the hidden speed-recording

#### Stock in foreign companies

There are 100 members in the U.S. Senate. A political scientist wants to estimate, with 95% confidence and within 3 percentage points, the percentage who own stock in foreig

#### Problem regarding the average lead concentration

Based on your results, comment on the possibility that the average lead concentration in this community's homes might exceed the Environmental Protection Agency's recomme

#### Study focusing on protection of human participants

Prepare a critical analysis of a quantitative study focusing on protection of human participants, data collection, data management and analysis, problem statement, and inter

#### Breaking strengths of a sample of eight cables

After a change was introduced in the process of manufacture of these cables, the breaking strengths of a sample of eight cables showed a standard deviation of 300 lb. Invest

#### Problem regarding the appropriate control charts

For each of the past 50 days, the number of catalog/coupon packages sent is as shown here. Construct one or more appropriate control charts and comment on the state of contr

#### What is the third scale

Note that interval level measurement does not provide an absolute zero value. The common temperature scales Celsius and Fahrenheit are both interval level measures. What is

#### Determining the competitive benchmarking effort

A university is starting a new college of engineering, has extensive funding, and wants to use com- petitive benchmarking. What U.S. universities might be useful as obje