Private colleges and universities rely on money contributed by individuals and corporations for their operating expenses
Posted: Wed May 11, 2022 2:34 pm
Private colleges and universities rely on money contributed by
individuals and corporations for their operating expenses. Much of
this money is invested in a fund called an endowment, and the
college spends only the interest earned by the fund. A recent
survey of 19 private colleges in the United States revealed the
following endowments (in millions of dollars): 2.8 189.4 36.2 440.5
281 206 124.4 95.5 197.2 304 48.3 30.8 356.7 218.3 211.3 279.7 100
96.8 72.9 Summary statistics yield the sample mean 173.25 millions
of dollars and the sample standard deviation 121.09 millions of
dollars. Construct and interpret a 99% confidence interval for the
mean endowment of all private colleges in the United States. You
may assume that the sample is from a normal population. Procedure:
Select an answer Assumptions: (select everything that applies) The
number of positive and negative responses are both greater than 10
Normal population Population standard deviation is unknown
Population standard deviation is known Simple random sample Sample
size is greater than 30 Unknown parameter:
individuals and corporations for their operating expenses. Much of
this money is invested in a fund called an endowment, and the
college spends only the interest earned by the fund. A recent
survey of 19 private colleges in the United States revealed the
following endowments (in millions of dollars): 2.8 189.4 36.2 440.5
281 206 124.4 95.5 197.2 304 48.3 30.8 356.7 218.3 211.3 279.7 100
96.8 72.9 Summary statistics yield the sample mean 173.25 millions
of dollars and the sample standard deviation 121.09 millions of
dollars. Construct and interpret a 99% confidence interval for the
mean endowment of all private colleges in the United States. You
may assume that the sample is from a normal population. Procedure:
Select an answer Assumptions: (select everything that applies) The
number of positive and negative responses are both greater than 10
Normal population Population standard deviation is unknown
Population standard deviation is known Simple random sample Sample
size is greater than 30 Unknown parameter: