One hundred and fifty customers provided overall performance ratings at each of

Question

One hundred and fifty customers provided overall performance ratings at each of three different bus depots (1, 2 and 3). The average performance scores were determined to be significantly different at alpha 0.05 using an ANOVA F-test. The researchers employed the Bonferroni method to rank the three performance means, and adjusted 95% confidence intervals for the differences between each pair of treatment means were computed: Comparison 95% Confidence Interval (mu1 - mu2) (1.50, 14.94) (mu2 - mu3) (15.96, 29.40) (mu2 - mu3)(7.74, 21.18) According to the results, there is significant difference between each pair of means. True False

Explanation / Answer

If the confidence interval do not contain 0 then results are statistically significant for difference in mean confidence interval.

Here any of the three intervals do not contain zero hence results are Statistical significant and there is significant difference between each pair of mean.

answer is True

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