Confidence Interval Estmation

[urgas1]

Can anyone help me with this problem? Thank you very much!

Confidence Interval Estimation

1. Compute a 95% confidence interval for the population mean, based on the sample 1, 2, 3, 4, 5, 6, and 30. Change the number from 30 to 10 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.

 

[Unco]

G'day,

95% confidence <-> Z = 1.96

7 data values (when 30 is incl.) <-> n = 7

You can calculate the mean and standard deviation of that data. Plug these into the confidence interval of a sample mean formula.

Repeat with the 30 excluded.

 

[urgas1]

Thank very much...