Confidence Intervals

#1
n=16
M=46
Sum of Squares=6000

Make a 95% confidence interval estimate of the population mean.

I got 35.345 TO 56.655

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n=100
M=62
SS=2475
Using the data make an interval estimate of the population mean speed so you are 90% confident that the real mean is your interval.
 
Last edited:

leo

New Member
#2
for q1 my answer is (36.51, 55.49). I think it is a matter of rounding off figures.

for q 2 - (61.18, 62.82) Za/2 = .10/2 = .05 t-value = 1.645