One property of the F-distribution used for the Analysis of Variance is that A. It is symmetric. B. The exact shape of the F-distribution depends on two different degrees of freedom. C. Values of the F-distribution can be negative. D. The total area under the curve is equal to 2.

Mr. Juan Rafael, the manager of JJ Computer Tech is conducting a study on the number of customers who pay by personal check, by credit card and by debit card. During the course of five days, he records the following number of purchases made by each method.

Check Credit Debit Card ANOVA Card 36 40 Source of 45 SS of MS Variation Fcomp 30 27 38 Among 718.9333 2 359.4667 groups 20 25 40 Error 564 12 47 15 35 47 Total 1282.933 14 20 26 35 Yi. 121 153 205 Pairs Absolute Mean Difference HSD value Description Check - Credit Card 6.4 Not significant Check - Debit Card 16.8 Significant Credit Card - Debit 10.4 Card Significant