statistcs As part of a study on web site use you want to det

As part of a study on web site use. you want to determine whether one particular variable (number of clicks on a certain page) could be reasonably approximated by a normal distribution. Which of the follow characteristics of your data would suggest to you that a normal distribution would be a reasonable model 99.7% of your data falls within plus or minus two standard deviations from the mean Your data has its mean equal to its variance Your data has very little skew and 95% of the values fall within plus or minus two standard deviations from the mean Your data is right skewed but is uni-modal When doing a two sample hypothesis test of equality of tuo means, you can use the Z distribution to find your critical values when You have large sample sizes You have small sample sizes and have to estimate the variances The sample sizes are equal and the variances are estimated You should never use the Z distribution for this test - the F distribution is required. Given the following ANOVA table (some information is missing), find the F statistic.

Solution

4)

C.

95% of values fall within plus minus 2 standard deviation from the mean

5)

B

you have small sample sizes and have the estimate the variances

6)

MS ) 115777.5 / 2 = 57888.75

57888.75 / 75474.2 = 0.767000