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Chapter 1: Q 70. (page 49)
One of the following scores was omitted from the stem plot below:
The missing number is
The correct option is (d)
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Deaths among young people Among persons aged to years in the United States, the leading causes of death and number of deaths in a recent year were
as follows: accidents, ; homicide, ; suicide, ; cancer, ; heart disease, ; congenital defects,
(a) Make a bar graph to display these data.
(b) To make a pie chart, you need one additional piece of information. What is it?
Buying music online Young people are more likely than older folk to buy music online. Here are the percent's of people in several age groups who bought music online in :
(a) Explain why it is not correct to use a pie chart to display these data.
(b) Make a bar graph of the data. Be sure to label your axes and title your graph.
Forty students took a statistics examination having a maximum of 50 points. The score distribution is given in the following stem-and-leaf plot:
The third quartile of the score distribution is equal to (a) 45. (b) 44. (c) 43. (d) 32. (e) 23.
The histogram below shows the distribution of the per cent of women aged 15 and over who have never married in each of the 50 states and the District of Columbia.
The center of this distribution is in the interval
(a) to
(b) to
(c)
(d) to
(e)to
Baseball paradox Most baseball hitters perform differently against right-handed and left-handed pitching. Consider two players, Joe and Moe, both of whom bat right-handed. The table below records their performance against right-handed and left-handed pitchers:
(a) Use these data to make a two-way table of player (Joe or Moe) versus outcome (hit or no hit).
(b) Show that Simpson’s paradox holds: one player has a higher overall batting average, but the other player hits better against both left-handed and right-handed pitching.
(c) The manager doesn’t believe that one player can hit better against both left-handers and right-handers yet have a lower overall batting average. Explain in
simple language why this happens to Joe and Moe.
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