Chapter 1: Q. 78. (page 53)
Die rolls Imagine rolling a fair, six-sided die 60 times. Draw a plausible graph of the distribution of die rolls. Should you use a bar graph or a histogram to display the data?
Chapter 1: Q. 78. (page 53)
Die rolls Imagine rolling a fair, six-sided die 60 times. Draw a plausible graph of the distribution of die rolls. Should you use a bar graph or a histogram to display the data?
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Get started for freeReturns on common stocks The return on a stock is the change in its market price plus Page Number: 51 any dividend payments made. Return is usually expressed as a percent of the beginning price. The figure shows a histogram of the distribution of monthly returns for the U.S. stock market over a 273-month period.
Part (a). Describe the overall shape of the distribution of monthly returns.
Part (b). What is the approximate center of this distribution?
Part (c). Explain why you cannot find the exact value for the minimum return. Between what two values does it lie?
Part (d). A return less than 0 means that stocks lost value in that month. About what percent of all months had returns less than 0?
I’d die without my phone! In a survey of over 2000 U.S. teenagers by Harris Interactive, 47% said that “their social life would end or be worsened without their cell phone.” 46 One survey question asked the teens how important it is for their phone to have certain features. The following figure displays data on the percent who indicated Page Number: 83 Page Number: 84 that a particular feature is vital.
Part (a). Explain how the graph gives a misleading impression.
Part (b). Would it be appropriate to make a pie chart to display these data? Why or why not?
Far from home A survey asked first-year college students, “How many miles is this college from your permanent home?” Students had to choose from the following options: 5 or fewer, 6 to 10, 11 to 50, 51 to 100, 101 to 500, or more than 500. The side-by-side bar graph shows the percentage of students at public and private 4-year colleges who chose each option. Write a few sentences comparing the distributions of distance from home for students from private and public 4-year colleges who completed the survey.
Who buys cars? A car dealer keeps records on car buyers for future marketing purposes. The table gives information on the last 4 buyers.
Part (a). Identify the individuals in this data set.
Part (b). What variables were measured? Classify each as categorical or quantitative.
Hispanic origins Here is a pie chart prepared by the Census Bureau to show the origin of the more than 50 million Hispanics in the United States in 2010. About what percent of Hispanics are Mexican? Puerto Rican?
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