M
mikethepenguin
Hello all I have been looking at the breakdowns.mtw file in minitab help and I have tried to calculate the 1-Sample Poisson Rate, 95% confidence interval. I just can't seem to get the same answer as minitab. Can anyone offer any help for hand calculations?
The data is below.
15, 16, 16,16, 17, 17, 17, 18, 18, 18, 18, 18, 19, 19, 19, 20, 21, 21, 21, 21,21, 21, 22, 22, 23, 23, 24, 25, 26, 26
Mean = 19.93
Variance 9.236781609
Standard deviation 3.039207398
95% confidence level (i used the t-table for this)2.045
Standard deviation/ Square root of (30) = 0.554880816
Confidence Interval (min, max)
= Mean - (2.045) * (0.5548)
=Mean + (2.045) * (0.5548)
18.79860206
21.0680646
The answers from Minitab are 18.3675, 21.5970
Can anyone help?
The data is below.
15, 16, 16,16, 17, 17, 17, 18, 18, 18, 18, 18, 19, 19, 19, 20, 21, 21, 21, 21,21, 21, 22, 22, 23, 23, 24, 25, 26, 26
Mean = 19.93
Variance 9.236781609
Standard deviation 3.039207398
95% confidence level (i used the t-table for this)2.045
Standard deviation/ Square root of (30) = 0.554880816
Confidence Interval (min, max)
= Mean - (2.045) * (0.5548)
=Mean + (2.045) * (0.5548)
18.79860206
21.0680646
The answers from Minitab are 18.3675, 21.5970
Can anyone help?