the random sample shown below was selected from a
normal distribution
7, 6 , 5 , 6 , 9, 3
a.) construct a 90% confidence interval for the population mean
u
(__,__)
From sample data
=
X / n = 6
S = sqrt [
X2 - n
2 / n-1 ] = 2
t critical value at 0.10 significance with 5 df = 2.015
90% confidence interval for
is
- t * S / sqrt(n) <
<
+ t * S / sqrt(n)
6 - 2.015 * 2 / sqrt(6) <
< 6 + 2.015 * 2 / sqrt(6)
4.35 <
< 7.65
90% CI Is ( 4.35 , 7.65 )
the random sample shown below was selected from a normal distribution 7, 6 , 5 , 6 , 9, 3 a.) construct a 90% confidence...
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