ZuoTi.Pro
Question

Many employers are concerned about employees wasting time by surfing the Internet and e-mailing friends during...

Many employers are concerned about employees wasting time by surfing the Internet and e-mailing friends during work hours. The article "Who Goofs Off 2 Hours a Day? Most Workers, Survey Says" summarized data from a large sample of workers.† Suppose that the CEO of a large company wants to determine whether the mean wasted time during an 8-hour workday for employees of her company is less than the mean of 120 minutes reported in the article. Each person in a random sample of 10 employees is asked about daily wasted time at work (in minutes). Participants would be guaranteed anonymity to obtain truthful responses. Suppose the resulting data are as follows.

138, 82, 99, 79, 123, 125, 129, 114, 118, 117

(a)

Calculate the point estimate (in minutes) for the population mean.

(b)

Assume that the population standard deviation is known to be σ = 54.8 minutes. We would like to estimate the population mean with 95% confidence. Calculate the margin of error (in minutes) of the point estimate. (Use a table or technology. Round your answer to three decimal places.)

(c)

Find a 95% confidence interval.

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

***If you have any doubt regarding the problem please write it in the comment section.if you are satisfied please give a LIKE if possible.

0 0
Add a comment
Know the answer?
Add Answer to:
Many employers are concerned about employees wasting time by surfing the Internet and e-mailing friends during...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • A growing concern of employers is time spent in activities like surfing the Internet and e-mailing...

    A growing concern of employers is time spent in activities like surfing the Internet and e-mailing friends during work hours. The San Luis Obispo Tribune summarized the fundings from a survey of a large sample of workers in an article that ran under the headline "Who Goofs Off 2 Hours a Day? Most Workers, Survey Says" (August 3, 2006). Suppose that the CEO of a large company wants to determine whether the average amount of waisted time during an 8-hour...

  • can any body help answer this Ef a large party wants to determine whether the roan...

    can any body help answer this Ef a large party wants to determine whether the roan West Ideas af her carry is less than the mean of 120 minutes recortes in the artide. Each person in a randorn sinple of 10 erralbytes is asked about daily Many employers are concerned about employees wasting time by suiting the Internet and e-malling fiends during work hours. The article "Who Goors or 2 Hours a Day? Most Workers, Survey Says'+ sumirartzed data from...

  • suppose that the amount of time a teenagers spend on the internet is normally distributed with...

    suppose that the amount of time a teenagers spend on the internet is normally distributed with a standard deviation of 1.5 hours. A sample of 100 teenagers is selected at random, and the sample mean computed as 6.5 hours. a. determine the 95% confidence interval estimate of the population mean. b. interpret what the confidence interval estimate tells you.

  • all answers please 3. The teachers union is concerned about the amount of time teachers spend...

    all answers please 3. The teachers union is concerned about the amount of time teachers spend each week doing schoolwork at home. A simple random sample of 56 teachers had a mean of 8.0 hours per week working at home after school. Assume that the population standard deviation is 1.5 hours per week. a) Construct a 95% confidence interval estimate for the mean number of hours per week a teacher spends working at home. b) Does the confidence interval support...

  • Question 5 (7 marks) Dr. Cooper, a professor of management, is studying the relationship between work...

    Question 5 (7 marks) Dr. Cooper, a professor of management, is studying the relationship between work schedules and family life. In a sample of 120 people who worked the night shift only he found the following: a. The mean weekly amount of time (in hours) they spent caring for their children was 27.2 hours, with a standard deviation of 10.3 hours. Determine a 95% confidence interval for the mean number of hours spent caring for their children. b. A total...

  • all answers please!! 1. A company that produces brendis concerned about the distribution of the amount of sodiu...

    all answers please!! 1. A company that produces brendis concerned about the distribution of the amount of sodium in its bread. The company takes a simple random sample of 100 slices of bread and compute the sample mean to be 103 milligrams of sodium per slice. Assume that the population standard deviation is 10 milligrams a) Construct a 95% confidence interval estimate for the mean sedium level. b) Construct a 99% confidence intervalestime for the mean sodium level. 2. Fill...

  • A simple random sample of 100 postal employees is used to test if the average time...

    A simple random sample of 100 postal employees is used to test if the average time postal employees have worked for the postal service has changed from the value of 7.5 years recorded 20 years ago. The sample mean was x = 7 years with a standard deviation of s = 2 years. Assume the distribution of the time the employees have worked for the postal service is approximately Normal. The hypotheses being tested are H0: ! = 7.5 versus...

  • A nutritionis wants to determine how much time onally people spend eating and drinking Suppose for...

    A nutritionis wants to determine how much time onally people spend eating and drinking Suppose for a random sample of 913 people age 15 or older the mean amount of time spent eating or drinking per day is 174 hours wit a standard deviation of 65 hour Complete parts (al through (d) below. (a) A histogram of time sport eating and drinking each day is skewed Use this result to explain why a large sample size is needed to construct...

  • MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the ques...

    MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Provide an appropriate response. 1) Many people think that a national lobby's successful fight against gun control legislation is reflecting the will of a minority of Americans. A random sample of 4000 citizens yielded 2250 who are in favor of gun control legislation. Estimate the true proportion of all Americans who are in favor of gun control legislation using a 98% confidence interval. Express the...

  • 1. Many companies use a incoming shipments of parts, raw materials, and so on. In the...

    1. Many companies use a incoming shipments of parts, raw materials, and so on. In the electronics industry, component parts are commonly shipped from suppliers in large lots. Inspection of a sample of n components can be viewed as the n trials of a binomial experimem. The outcome for each component tested (trialD will be that the component is classified as good or defective defective components in the lot do not exceed 1 %. Suppose a random sample of fiver...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT