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February 28, 2015

February 28, 2015

Posted by **Inez** on Friday, October 15, 2010 at 1:39pm.

sample scores of 1,2,3,4,5 and 95 percent confidence interval about the sample mean

- statistics -
**MathGuru**, Friday, October 15, 2010 at 7:29pmYou will have to calculate the mean and standard deviation. You will need those values to plug into a confidence interval formula.

If you use a z-table, the formula is:

CI95 = mean + or - 1.96(sd/√n)

...where n = sample size, sd = standard deviation, + or - 1.96 represents the 95% confidence interval using a z-table.

I hope this will help.

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