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Mean prices of drugs at the three online sites

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The following table contains the purchase price for 10 common drugs from three different internet sites.

Drug                            Site#1                          Site#2                                      Site#3

A                                 235.54                         269.99                                     121.02

B                                 157.99                         190.99                                     55.30

C                                 166.00                         190.99                                     93.45

D                                 174.99                         200.99                                     137.70

E                                  108.60                         129.99                                     22.48

F                                  186.66                         203.99                                     161.93

G                                 107.99                         106.99                                     64.53

H                                 117.39                         134.99                                     59.83

I                                   115.99                         126.99                                     57.75

J                                   181.10                         200.99                                     58.79

(a) At 0.05 level of significance, determine if there is evidence of a difference in the mean prices of drugs at the three online sites?

(b) Use the Tukey procedure to determine which site prices differ? Use a 0.05 level of significance.

Reference no: EM13245647

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