Question: A sample selected from a population gave a sample proportion equal to .31. a. Make a 95% confidence interval for p assuming n = 1200.

A sample selected from a population gave a sample proportion equal to .31.
a. Make a 95% confidence interval for p assuming n = 1200.
b. Construct a 95% confidence interval for p assuming n = 500.
c. Make a 95% confidence interval for p assuming n = 80.
d. Does the width of the confidence intervals constructed in parts a through c increase as the sample size decreases? If yes, explain why.

Step by Step Solution

★★★★★

3.31 Rating (157 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

p 31 and 1 p 1 31 69 a n 1200 and sp p n 31691200 01335103 ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

492-M-S-P-E (609).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

A sample of 200 observations selected from a population gave a sample proportion equal to .27. a. Make a 99% confidence interval for p. b. Construct a 97% confidence interval for p. c. Make a 90%...

A 90% confidence interval for p given that p = 0.85 and n = 120 Use the normal distribution to find a confidence interval for a proportion p given the relevant sample results. Give the best point...

A 95% confidence interval for p given that p = 0.38 and n = 500 Use the normal distribution to find a confidence interval for a proportion p given the relevant sample results. Give the best point...

8.77 A sample selected from a population gave a sample proportion equal to .31. a. Make a 95% confidence interval for p assuming n 1200. b. Construct a 95% confidence interval for p assuming n 500....

8.76 A sample selected from a population gave a sample proportion equal to .73. a. Make a 99% confidence interval for p assuming n 100. b. Construct a 99% confidence interval for p assuming n 600....

a) A sample of 105 sanitation workers for the city of Euonymus, Texas, earns an average of $24,375 per year. The average salary for all Euonymus city workers is $24,230, with a standard deviation of...

2. The standard deviation for a population is 7.14. A random sample selected from this population gave a mean equal to 48.52. a. Make a 95% confidence interval for the population mean assuming a...

The standard deviation for a population is = 7.14. A random sample selected from this population gave a mean equal to 48.52. a. Make a 95% confidence interval for assuming n = 196. b. Construct a...

8.75 A sample of 200 observations selected from a population gave a sample proportion equal to .27. a. Make a 99% confidence interval for p. b. Construct a 97% confidence interval for p. c. Make a...

In designing concrete structures, normally maximum aggregate sizes are adopted with ranges from 10mm to 20mm. Does an increase of maximum aggregate size benefit the structures?

Inscribe a research paper on Changes in the Criminal Justice System in U.S.

You are analyzing three competitors, shown below. Required: Calculate the free cash flows for the three firms. (5000) 291,000 23,000 Increase (decrease) in working capital23,000 15,000) 29,000)...

4. Which of the following statements correctly describes an unfavorable material price variance? a. Too much material was purchased. b. A higher price was paid for material purchased compared with...

How is the need for quick decisions related to the need to make ethical decisions?

274/3 Simplify without using a calculator.

813/4 Simplify without using a calculator.

9-3/2 Simplify without using a calculator.

The surgery center's building in downtown Charleston has an attached garage, but CPSC employees and patients use only about 50% of the garage's space. The CFO is under discussions to lease the...

Based on past 23 years, Westerfield Industrial Supply's common stock has yielded an arithmetic average rate of return of 10.5 percent. The geometric average return for the same period was 8.57...

exhibit9.9 Based on Exhibit 9-9, or using a financial calculator, what would be the monthly mortgage payments for each of the following situations? Note: Round time value factor and final answers to...