Question

The increasing annual cost (including tuition, room, board, books and fees) to attend college has been widely discussed in many publications including Money magazine. The following random samples show the annual cost of attending private and public colleges. Data are in thousands of dollars. Round degrees of freedom to the preceding whole number. Private Colleges 52.8 43.2 45.0 33.3 44.0 30.6 45.8 37.8 50.5 42.0 Public Colleges 20.3 22.0 28.2 15.6 24.1 28.5 22.8 25.8 18.5 25.6 14.4 21.8 a. Compute the sample mean and sample standard deviation for private and public colleges. Round your answers to two decimal places. b. What is the point estimate of the difference between the two population means? Round your answer to one decimal place. Interpret this value in terms of the annual cost of attending private and public colleges. c. Develop a confidence interval of the difference between the mean annual cost of attending private and public colleges. confidence interval, private colleges have a population mean annual cost to more expensive than public colleges. Private Public 52.8 20.3 43.2 22.0 45.0 28.2 33.3 15.6 44.0 24.1 30.6 28.5 45.8 22.8 37.8 25.8 50.5 18.5 42.0 25.6 14.4 21.8

          The increasing annual cost (including tuition, room, board,
books and fees) to attend college has been
widely discussed in many publications including Money
magazine. The following random samples show the annual cost of
attending private and public colleges. Data are in thousands of
dollars. Round
degrees of freedom to the preceding whole number.
Private Colleges
52.8
43.2
45.0
33.3
44.0
30.6
45.8
37.8
50.5
42.0
Public Colleges
20.3
22.0
28.2
15.6
24.1
28.5
22.8
25.8
18.5
25.6
14.4
21.8
a. Compute the sample mean and sample standard
deviation for private and public colleges. Round your answers to
two decimal places.
b. What is the point estimate of the difference
between the two population means? Round your answer to one decimal
place.
Interpret this value in terms of the annual cost of attending
private and public colleges.
c. Develop a confidence interval of
the difference between the mean annual cost of attending private
and public colleges.
confidence interval, private colleges have a population mean
annual cost to more expensive
than public colleges. 
Private
Public
52.8
20.3
43.2
22.0
45.0
28.2
33.3
15.6
44.0
24.1
30.6
28.5
45.8
22.8
37.8
25.8
50.5
18.5
42.0
25.6
14.4
21.8

Added by Jaime W.

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