A research council wants to estimate the mean length of time (in minutes) the average U S adult spends watching television using digital video recorders (DVRs) each day To determine this estimate, the research council takes a random sample of 20 U S adults and obtains the times (in minutes) below From past studies, the research council assumes that is 4 3 minutes and that the population of times is normally distributed Use the information to construct the 90 and 99 confidence intervals for the population mean Interpret the results and compare the widths of the confidence intervals If convenient, use technology to construct the confidence intervals 24 27 26 29 33 21 18 24 23 34 17 15 19 23 25 29 36 19 18 22

Question: A research council wants to estimate the mean length of time (in minutes) the average U.S. adult spends watching television using digital video recorders (DVRs)

A research council wants to estimate the mean length of time (in minutes) the average U.S. adult spends watching television using digital video recorders (DVRs) each day. To determine this estimate, the research council takes a random sample of 20 U.S. adults and obtains the times (in minutes) below.

24 27 26 29 33 21 18 24 23 34 17 15

From past studies, the research council assumes that σ is 4.3 minutes and that the population of times is normally distributed.

Use the information to construct the 90% and 99% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. If convenient, use technology to construct the confidence intervals.

24 27 26 29 33 21 18 24 23 34 17 15 19 23 25 29 36 19 18 22

Step by Step Solution

★★★★★

3.38 Rating (160 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

x x n 482 20 241 90 CI x z c n 241 1645 43 20 241 1582 225 257 99 CI x ... 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)

598-M-S-P (4965).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

A fellow employee, Phil, has not been contributing equally to complete the normal weekly work at hand. Phil claims he is contributing, but that he is swamped with other work and the emotional...

A tennis enthusiast wants to estimate the mean length of mens singles matches held during the Wimbledon tennis tournament. From the Wimbledon history archives, he randomly selects 40 matches played...

A fish hatchery manager wants to estimate the mean length of her 3-year-old hatchery-raised trout. She wants to make a 99% confidence interval accurate to within 1\3 of a standard deviation. How...

A hospital administrator wants to estimate the mean length of stay for all inpatients using that hospital. Using a random sample of 100 records of patients for the previous year, she reports that The...

Constructing Confidence Intervals, In Exercises 45, use the information to construct 90% and 99% confidence intervals for the population mean. Interpret the results and compare the widths of the...

A group of researchers estimates the mean length of time (in minutes) the average U.S. adult spends watching television using digital video recorders (DVRs) and other forms of time-shifted television...

Can someone PLEASE help me figure out how to find the answer for this STAT homework? A research council wants to estimate the mean length of time (in minutes) that the average U.S. adult spends...

A research council wants to estimate the mean length of time (in minutes) that the average U.S. adult spends watching television using digital video recorders (DVR's) each day. To determine the...

You own a small storefront retail business and are interested in determining the average amount of money a typical customer spends per visit to your store. You take a random sample over the course of...

2. There are 24 students enrolled in an introductory statistics class at a small university. Asan in-class exercise the students were asked how many hours of television they watcheach week. Their...

Confirming Pages C H A P T E R 19 Analyzing Information and Writing Reports Chapter Outline Using Your Time Efficiently Analyzing Data and Information for Reports Identifying the Source of the Data...

A Carnot engine works between two heat reservoirs at temperatures Th = 300 K and Tc = 200K. (a) What is its efficiency? (b) If it absorbs 100 J from the hot reservoir during each cycle, how much work...

Calculate the coefficient of performance of a Carnot-cycle heat pump operating between reservoirs at 0C and 45C. Compare the result with that of Problem 7.21.

which of the following costs is / are irrelevant for decision making? I. only future costs II . all past costs and benefits III. differential future costs and benefits

A balloon initially contains 65 m3 of helium gas at atmospheric conditions of 100 kPa and 22°C. The balloon is connected by a valve to a large reservoir that supplies helium gas at 150 kPa and...

Calculate the current in the circuit of Fig. 19-43 and show that the sum of all voltage changes around the circuit is zero. r= 2.02 ww 9.0 V 8.0 2 12.0 2

Jerry Karron, an auditor with Joshi CPAs, is performing a review of Duncan Companys Inventory account. Duncan did not have a good year, and top management is under pressure to boost reported income....

Laib Camera Shop Inc. uses the lower-of-cost-or-market basis for its inventory. The following data are available at December 31. InstructionsWhat amount should be reported on Laib Camera Shop's...

Derive cash disbursements for dividends Johnson & Johnson, a pharmaceutical and medical products company, reported a balance in retained earnings of $26,571 million at the beginning of the year and...

Apply Borchers and Enke's (2022) ten-point plan to the content marketing practices of a company of your choice. Is the ten-point plan a reasonable and applicable approach for encouraging content...

An education researcher claims that the overall average score of 15-year-old students on an international mathematics literacy test is 494. You want to test this claim. You randomly select the...

A polling agency reports that over 40% of U.S. adults say they are less likely to travel to Europe in the next six months for fear of terrorist attacks. In a random sample of 1000 U.S. adults, 42%...

A labor researcher claims that 6% of U.S. employees say it is likely they will be laid off in the next year. In a random sample of 547 U.S. employees, 44 said it is likely they will be laid off in...

If managed effectively, Rearden Metal will have assets with a market value of $200 million. $300 million, or $400 million next year. with each outcome being equally likely. Managers, however, may...

Task # 3 ( CAPM and the equity cost of capital ) You need to estimate the equity cost of capital for XYZ Corp. You have the following data available regarding past returns: a ) What was XYZ ' s...

Seven years ago, after 15 years in public accounting, Stanley Booker, CPA, resigned his position as manager of cost systems for Davis, Cohen, and OBrien Public Accountants and started Track Software,...