Question
The monthly incomes for 1212 randomly selected people, each with a bachelor's degree in economics, are shown on the right. Complete parts (a) through (c)
The monthly incomes for
1212
randomly selected people, each with a bachelor's degree in economics, are shown on the right. Complete parts (a) through (c) below.
Assume the population is normally distributed.
4450.844450.84
4596.284596.28
4366.394366.39
4455.484455.48
4151.634151.63
3727.583727.58
4283.934283.93
4527.594527.59
4407.764407.76
3946.013946.01
4023.524023.52
4221.264221.26
The monthly incomes for 1212 randomly selected people, each with a bachelor's degree in economics, are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed. |
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Question content area bottom
Part 1
(a) Find the sample mean.
x overbarxequals=enter your response here
(Round to one decimal place as needed.)
Part 2
(b) Find the sample standard deviation.
s equals=enter your response here
(Round to one decimal place as needed.)
Part 3
(c) Construct a
90%
confidence interval for the population mean
mu.
A
90%
confidence interval for the population mean is
(enter your response here,enter your response here).
(Round to one decimal place as needed.)
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