# Statistics

posted by .

An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within one year of the population mean. Assume the population of ages is normally distributed. Determine the minimum required sample size to construct a 80% confidence interval for the population mean. Assume the population standard deviation is 1.2 years

## Similar Questions

1. ### Math

According to a student project for statistics 250, the amount of money spent on texts per semester by the population of students at a small liberal arts college is normally distributed with a mean of \$426 and a standard deviation of …

According to a student project for statistics 250, the amount of money spent on texts per semester by the population of students at a small liberal arts college is normally distributed with a mean of \$426 and a standard deviation of …
3. ### elizabeth high school

. An admissions director wants to estimate the mean age of all students enrolled at a college. The estimate must be within one year of the population mean. Assume the population of ages is normally distributed. Determine the minimum …
4. ### Statistics

A study is being planned to estimate the mean number of semester hours taken by students at a college. The population standard deviation is assumed to be o=4.7 hours. How many students should be included in the sample to be 99% confident …
5. ### statistics

A sociologist is studying marriage customs in a rural community in Denmark to determine the age of the woman at the time of her first marriage. The sample standard deviation of these ages was 2.3 years. The sociologist wants to estimate …
6. ### statistics

A sociologist is studying marriage customs in a rural community in Denmark to determine the age of the woman at the time of her first marriage. the sample standard deviation of these ages was 2.3 years. The sociologist wants to estimate …
7. ### statistics

The data below are the ages of a random sample of 8 men in a bar. It is known that the population of ages are normally distributed with a standard deviation of 11. Determine the 93% confidence interval estimate of the population mean. …
8. ### Statistics (urgent)

A beverage comopany uses a machine to automatically fill 1-liter bottles. Assume that the population of volumes is normally distributed. The company wants to estimate the mean volume of water to within 1 ML. Determine the minimum sample …
9. ### statistics

Use the given information to find the minimum sample size required to estimate an unknown population mean u. How many adults must be randomly selected to estimate the mean FICO (credit rating)score of working adults in a country?
10. ### statistics

Use the given information to find the minimum sample size required to estimate an unknown population mean μ. How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters?

More Similar Questions