# Question

“Tweens or teens” refers to the age group of students in seventh grade. Growth spurts are very common at this age. A sample of 12 randomly selected seventhgrade females in a New York City school resulted in the following heights:

Assuming heights of females in the 12- to 13-year-age group are normally distributed with a standard deviation of 2.56 inches:

a. What is the parameter of interest?

b. Find the point estimate for the population mean height of seventh-grade females.

c. Find the 0.95 confidence interval for the population mean height of seventh-grade females.

Assuming heights of females in the 12- to 13-year-age group are normally distributed with a standard deviation of 2.56 inches:

a. What is the parameter of interest?

b. Find the point estimate for the population mean height of seventh-grade females.

c. Find the 0.95 confidence interval for the population mean height of seventh-grade females.

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