Calculate the variance.
A marketing researcher for a toothpaste company wants to know how often on average people brush their teeth per day. He obtains a sample of 25 adults. Their responses to his question are summarized in the following simple frequency distribution:
X f
10 1
9 0
8 0
7 3
6 3
5 0
4 4
3 3
2 8
1 2
0 1
Ans: 5.89
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Refer to Exhibit 7-10. The mean grade for an advanced statistics course will be higher than the mean grade for an introductory course in statistics
a. Chi Square b. Multifactor Analysis of Variance c. t-test for dependent means d. t-test for independent means e. None of these are true.
The "ABC" of a functional behavior assessment is:
A. antithesis, beginning, collection B. antecedent, behavior, consequence C. attitude, belief, culture D. none of the above
The Equal Pay Act requires employers to
A. pay all employees on the same scale. B. pay the same salary to men and women who perform similar jobs. C. pay all employees a living wage. D. pay female employees at least 70 percent of the average salary earned by male employees.
A smaller alpha value indicates ______.
a. a higher likelihood of rejecting the null hypothesis b. a lower likelihood of rejecting the null hypothesis c. a lower likelihood of retaining the null hypothesis d. a higher likelihood of retaining the alternative hypothesis