COMM 217 Study Guide - Confidence Interval, Dependent And Independent Variables, Simple Random Sample
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1. the quartile 1 and quartile 3 monthly sales of a retail store for a three years period prior to the implementation of new promotion policy were . 5 million and . 5 million respectively. After the policy was implemented quartile 1 and quartile 3 sales were . 5 and . 5 million respectively. Minimum and maximum values are 550 and 950. A sample is taken and a relative frequency developed that shows 25% have values less than 675 and 75% less than 825. Minimum and maximum values are 575 and 825 respectively. Assume that for data sets a and b quartiles 1 are identical; and that quartiles 3 are also identical for the data sets ( a and b). The process generating the two distributions are not believed to be normal a) It follows that the variances are equal for both a and b: the means of the two data sets are equal c)
