Posted by Tyler on Thursday, December 19, 2013 at 4:21am.
Suppose the following data are selected randomly from a population of normally distributed values.
42
51 43 48 41 57 54
39 45 48 45 39 46
Construct a 95% confidence interval to estimate the population mean.
Round the intermediate values to 2 decimal places. Round your answers to 2 decimal places, the tolerance is +/0.05.
I do not understand how to find the 's' for the estimate of standard deviation from the sample.
n=13
xbar=46
df= 12
alpha/2= 0.025
Therefore, t= 2.179
And I am stuck...

Stats  Kuai, Thursday, December 19, 2013 at 2:37pm
n=13
xbar=46
df= 12
alpha/2= 0.025
Therefore, t= 2.179
Sd = 5.5377
t = 2.179
(42.65, 49.35)
Z = 1.96
(42.99,49.01)
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