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Chapter 1: Q. 10 (page 78)
Mercury in Tuna
There appears to be a difference.
Given
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Which of the following bar graphs is equivalent to the pie chart in Question T1.2?
Electoral votes To become president of the United States, a candidate does not have to receive a majority of the popular vote. The candidate does have to win a majority of the electoral votes that are cast in the Electoral College. Here is a stemplot of the number of electoral votes for each of the states and the District of Columbia.
(a) Make a boxplot of these data by hand. Be sure to check for outliers.
(b) Which measure of center and spread would you use to summarize the distribution鈥攖he mean and standard deviation or the median and IQR? Justify your answer.
Which of the following statements about this distribution is not correct?
(a) The histogram is right-skewed.
(b) The median is less than
(c) The IQR is
(d) The mean is greater than the median.
(e) The histogram is unimodal.
We used Census At School鈥檚 鈥淩andom Data Selector鈥� to choose a sample of Canadian students who completed a survey from
The bar graph displays data on students鈥� responses to the question 鈥淲hich of these methods do you most often use to communicate with your friends?鈥�
(a) Would it be appropriate to make a pie chart for these data? Why or why not?
(b) Jerry says that he would describe this bar graph as skewed to the right. Explain why Jerry is wrong.
Attitudes toward recycled products Exercise gives data on the opinions of people who have and have not bought coffee filters made from recycled paper.
To see the relationship between opinion and experience with the product, find the conditional distributions of opinion (the response variable) for buyers and nonbuyers. What do you conclude?
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