1.

A fitness center is interested in finding a 98% confidence interval for the mean number of days per week that Americans who are members of a fitness club go to their fitness center. Records of 215 members were looked at and their mean number of visits per week was 2.5 and the standard deviation was 1.9. Round answers to 3 decimal places where possible.

a. To compute the confidence interval use a ? t z distribution.

b. With 98% confidence the population mean number of visits per week is between and visits.

c. If many groups of 215 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of visits per week and about percent will not contain the true population mean number of visits per week.

2.

You are interested in finding a 98% confidence interval for the average commute that non-residential students have to their college. The data below show the number of commute miles for 13 randomly selected non-residential college students. Round answers to 3 decimal places where possible.

1524272411132713202324623

a. To compute the confidence interval use a ? t z distribution.

b. With 98% confidence the population mean commute for non-residential college students is between and miles.

c. If many groups of 13 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of commute miles and about percent will not contain the true population mean number of commute miles.

3. Isabella wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She randomly selects a sample of 42 cookies and finds that the number of chocolate chips per cookie in the sample has a mean of 11.6 and a standard deviation of 1.4. What is the 95% confidence interval for the number of chocolate chips per cookie for Big Chip cookies? Assume the data is from a normally distributed population. Round answers to 3 decimal places where possible.

< μμ <

4.

You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures:

38.324.320.745.416.926.627.727.331.319.429.3

Find the 80% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to 3 decimal places. Assume the data is from a normally distributed population.

80% C.I. =

—–

1.

A fitness center is looking for a 98 percent confidence interval for the average number of days per week that Americans who are members of a fitness club visit the facility. A total of 215 members’ records were examined, with a mean number of visits per week of 2.5 and a standard deviation of 1.9. If possible, round your answers to three decimal places.

a. Use a? t z distribution to compute the confidence interval.

b. The population mean number of visits per week is between and visits, with 98 percent confidence.

c. If many groups of 215 randomly selected members are studied, each group will produce a different confidence interval. The true population will be found in about a quarter of these confidence intervals.

The price is based on these factors:

Academic level

Number of pages

Urgency

Basic features

- Free title page and bibliography
- Unlimited revisions
- Plagiarism-free guarantee
- Money-back guarantee
- 24/7 support

On-demand options

- Writer’s samples
- Part-by-part delivery
- Overnight delivery
- Copies of used sources
- Expert Proofreading

Paper format

- 275 words per page
- 12 pt Arial/Times New Roman
- Double line spacing
- Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Delivering a high-quality product at a reasonable price is not enough anymore.

That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read moreEach paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read moreThanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read moreYour email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read moreBy sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more