#2 CI Mean

You are interested in finding a 90% confidence interval for the average commute that non-residential students have to their college. The data below show the number of commute miles for 10 randomly selected non-residential college students. 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 minutes of concentration is between ____  and ____  minutes.

c. If many groups of 103 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 minutes of concentration and about ____ percent will not contain the true population mean minutes of concentration. 

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 14 randomly selected non-residential college students.

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

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

c. If many groups of 14 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. 

You are interested in finding a 90% confidence interval for the average commute that non-residential students have to their college. The data below show the number of commute miles for 14 randomly selected non-residential college students. Round answers to 3 decimal places where possible.

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

b. With 90% confidence the population mean commute for non-residential college students is between  and   miles.

c. If many groups of 14 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. 

You are interested in finding a 98% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for 13 randomly selected college students. 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 days of class that college students miss is between  and   days.

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 missed class days and about percent will not contain the true population mean number of missed class days. 

You are interested in finding a 95% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for 10 randomly selected college students. Round answers to 3 decimal places where possible.

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

b. With 95% confidence the population mean number of days of class that college students miss is between ___ and ___  days.

c. If many groups of 10 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 missed class days and about _____ percent will not contain the true population mean number of missed class days.

You are interested in finding a 95% confidence interval for the mean number of visits for physical therapy patients. The data below show the number of visits for 13 randomly selected physical therapy patients. Round answers to 3 decimal places where possible.

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

b. With 95% confidence the population mean number of visits per physical therapy patient is between___and ____visits.

c. If many groups of 13 randomly selected physical therapy patients 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 patient and about_____percent will not contain the true population mean number of visits per patient. 

You are interested in finding a 95% confidence interval for the mean number of visits for physical therapy patients. The data below show the number of visits for 13 randomly selected physical therapy patients. Round answers to 3 decimal places where possible.

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

b. With 95% confidence the population mean number of visits per physical therapy patient is between  and   visits.

c. If many groups of 13 randomly selected physical therapy patients 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 patient and about  percent will not contain the true population mean number of visits per patient. 

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 15 randomly selected non-residential college students. Round answers to 3 decimal places where possible.

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

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

c. If many groups of 15 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. 

You are interested in finding a 90% confidence interval for the average commute that non-residential students have to their college. The data below show the number of commute miles for 15 randomly selected non-residential college students.

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

b. With 90% confidence the population mean commute for non-residential college students is between  and   miles.

c. If many groups of 15 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About Correct percent of these confidence intervals will contain the true population mean number of commute miles and about Correct percent will not contain the true population mean number of  commute miles. 

You are interested in finding a 95% confidence interval for the average commute that non-residential students have to their college. The data below show the number of commute miles for 10 randomly selected non-residential college students. Round answers to 3 decimal places where possible.

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

b. With 95% confidence the population mean commute for non-residential college students is between  and   miles.

c. If many groups of 10 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. 

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 11 randomly selected non-residential college students. Round answers to 3 decimal places where possible.

a. With 98% confidence the population mean commute for non-residential college students is between _____  and____miles.

b. If many groups of 11 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. 

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 11 randomly selected non-residential college students. Round answers to 3 decimal places where possible.

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

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

c. If many groups of 11 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About what  ____ 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. 

You are interested in finding a 90% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for 10 randomly selected college students. Round answers to 3 decimal places where possible.

a. To compute the confidence interval use a     distribution.

b. With 90% confidence the population mean number of days of class that college students miss is between  and   days.

c. If many groups of 10 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 missed class days and about  percent will not contain the true population mean number of missed class days.