The following are the number of mistakes made in 5 successive days for 4 technic

Question

The following are the number of mistakes made in 5 successive days for 4 technicians working for a photographic laboratory:

Tech I Tech II Tech III Tech IV

6           14          10           9

14         9            12          12

10        12           7            8

8          10          15          10

11        14          11          11

Test at the level of significance = 0.01 whether the differences among the 4 sample means can be attributed to chance.

Explanation / Answer

enter data into 4 lists on calculator use ANOVA function under STAT>TESTS Get P = 0.58 > 0.01 no evidence of difference in means

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