The population parameters below describe the full-time equivalent number of students (ftes) each year at lake tahoe community college from 1976–1977 through 2004–2005.
• μ = 1000 ftes
• median = 1,014 ftes
• σ = 474 ftes
• first quartile = 528.5 ftes
• third quartile = 1,447.5 ftes
• n = 29 years
a. a sample of 11 years is taken. about how many are expected to have a ftes of 1014 or above? explain how you determined your answer.
b. 75% of all years have an ftes:
i. at or below:
ii. at or above:
c. the population standard deviation =
d. what percent of the ftes were from 528.5 to 1447.5? how do you know?