3. A newsboy makes his sales at a three-lane light. To find out if there is a variation in sales per lane, count how many sales you make per lane during rush hour for 4 days and do an ANOVA test with a significance of 0.05.

In an ANOVA test for the mean of three populations 1, 2 and 3, with significance = 0.05 and the following sample data,

what is the sample mean of lane 1.

Lane 1 Lane 2 Lane 3 Day 1 26 20 20 Day 2 23 20 17 Day 3 13 21 28 Day 4 12 15 21

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