Q1) point averages(GPA) for 12 randomly chosen college students are shown on right. Suppose population is normally distributed.
|
2.4
|
3.5
|
2.9
|
|
1.9
|
0.8
|
4.0
|
|
2.3
|
1.5
|
3.7
|
|
0.2
|
2.2
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3.2
|
i) Determine the sample mean.
ii) Determine the sample standard deviation
ii) Create a 95% confidence interval for population mean µ.
95% confidence interval for population mean is
Q2) Using data table given below, find out the range and median?
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$110
|
$200
|
$190
|
$175
|
|
$120
|
$120
|
$190
|
$100
|
|
$180
|
$100
|
$170
|
$145
|
|
$95
|
$185
|
$100
|
$210
|
|
$135
|
$195
|
$240
|
$120
|
a) $95 to $210
b) $145
c) $95
d) $115