Chapter 3 HW

# Chapter 3 HW - Chapter 3 1(Hypothetical In a sample of...

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Chapter 3 1 . (Hypothetical.) In a sample of families in a certain town, a histogram for the distribution of incomes is shown below. a) Are there more families with incomes between \$20,000 and \$30,000 or between \$30,000 and \$40,000? b) Are there more families with incomes between \$20,000 and \$30,000 or between \$30,000 and \$50,000? c) About what percentage of the families have incomes between \$17,000 and \$18,000? 2. In a college statistics class, the final exam scores were distributed as follows: Score Count 0-10 5 10-50 8 50-60 0 60-70 7 70-80 15 80-90 24 90-100 22 Assume that for each class interval, the left end point falls in that class interval. a) Draw a relative frequency histogram for the data. b) If it took an 80% to make a B on the final, what percentage of the class made B’s or better? c) Give a possible explanation for the small rise at the far left of the histogram.

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3. (Hypothetical.) The histogram for the distribution of children per family in one town is shown below. There were 10,000 families in the town. a)What percentage of the families have an only child?
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## This note was uploaded on 04/07/2008 for the course MATH 1680 taught by Professor Patton during the Spring '08 term at North Texas.

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Chapter 3 HW - Chapter 3 1(Hypothetical In a sample of...

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