A professor records the following grades on a quiz: 5, 6, 7, 7, and 10. Which of the following statements is true?
A. The mean, median, and mode are all the same value.
B. The mode and median are larger than the mean.
C. The median and mean are larger than the mode.
D. The mean and mode are larger than the median.
Ans: A
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What concerns were uncovered regarding the usefulness of effective school research?
a. Problems in research design and methodology b. Too much emphasis on the standardized test scores c. Evaluation on correlates of ineffectiveness d. The exclusive use of snapshots of the phenomena on student achievement
What is the sample size?
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 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 Use this grouped frequency distribution to answer the following questions:
Painting should be an activity available to children in the art center every day
a. True b. False
Children of working parents in the United States are most often cared for by
a. one of their parents. b. a quality preschool program. c. their grandparents. d. someone other than their parents.