Question

A fitness center is interested in finding a 98% confidence interval for the mean number of...

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 234 members were looked at and their mean number of visits per week was 2.1 and the standard deviation was 2.7.

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 234 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.

Homework Answers

Answer #1

a) t distribution, as only sample standard deviation is known.

b)

c) 98%, 2%

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A fitness center is interested in finding a 98% confidence interval for the mean number of...
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 228 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 ?  distribution. b. With 98% confidence, the population mean...
A fitness center is interested in finding a 98% confidence interval for the mean number of...
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 240 members were looked at and their mean number of visits per week was 3.3 and the standard deviation was 1.8. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a distribution. b. With 98% confidence the population mean...
A fitness center is interested in finding a 98% confidence interval for the mean number of...
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 219 members were looked at and their mean number of visits per week was 2.5 and the standard deviation was 1.8. Round answers to 3 decimal places where possible. b. With 98% confidence the population mean number of visits per week is between  and   visits. c....
A fitness center is interested in finding a 98% confidence interval for the mean number of...
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 268 members were looked at and their mean number of visits per week was 2.5 and the standard deviation was 2.9. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? t z  distribution. b. With 98% confidence the...
A fitness center is interested in finding a 98% confidence interval for the mean number of...
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 232 members were looked at and their mean number of visits per week was 3.2 and the standard deviation was 2.6. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? t z  distribution. b. With 98% confidence the...
A fitness center is interested in finding a 90% confidence interval for the mean number of...
A fitness center is interested in finding a 90% 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 247 members were looked at and their mean number of visits per week was 2.1 and the standard deviation was 2.9. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? z or t  distribution. b. With 90% confidence...
A fitness center is interested in finding a 95% confidence interval for the mean number of...
A fitness center is interested in finding a 95% 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 237 members were looked at and their mean number of visits per week was 2.5 and the standard deviation was 1.6. a. To compute the confidence interval use a distribution. b. With 95% confidence the population mean number of visits per week is between answer...
A fitness center is interested in finding a 95% confidence interval for the mean number of...
A fitness center is interested in finding a 95% 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 245 members were looked at and their mean number of visits per week was 2.4 and the standard deviation was 1.6. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? t z  distribution. b. With 95% confidence the...
A fitness center is interested in finding a 99% confidence interval for the mean number of...
A fitness center is interested in finding a 99% 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 253 members were looked at and their mean number of visits per week was 2.4 and the standard deviation was 2.8. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? t z  distribution. b. With 99% confidence the...
A fitness center is interested in finding a 95% confidence interval for the mean number of...
A fitness center is interested in finding a 95% 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 263 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 95% confidence the...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT