Questions and Answers of Intro Stats

A last is a form, traditionally made of wood, in the shape of the human foot. Lasts of various sizes are used by shoemakers to make shoes. In the United States, shoe sizes are defined differently for
For the number of adoptions in Exercise 12,a) Which would you expect to be larger: the median or the mean? Explain briefly.b) Which would you report: the mean or the median? Explain briefly.Data From
For the shoe sizes in Exercise 16, what might be the problem with either the mean or the median as a measure of center?Data From Exercise 16A last is a form, traditionally made of wood, in the shape
For the 190 life expectancies in Exercise 15, a) Would you report the standard deviation or the IQR?b) Justify your answer briefly.Data From Exercise 15Here are the life expectancies at birth in
For the number of adoptions in Exercise 12,a) Would you report the standard deviation or the IQR?b) Justify your answer briefly.Data From Exercise 12The U.S. Census Bureau keeps track of the number
For the bicep measurements in Exercise 10, would you report the mean, the median, or both? Explain briefly.Data From Exercise 10The study in Exercise 9 actually measured the bicep circumference in
Here is a bar chart summarizing the movie genres from the 891 movies in Exercise 3.a) Were Thriller/Suspense or Adventure films more common?b) Is it easier to answer the question from the bar chart
Here is a bar chart summarizing the movie ratings from the 891 movies shown in Exercise 4.a) Which was the least common rating?b) Is it easier to answer the question from the bar chart from the pie
For the bicep measurements in Exercise 10, would you report the standard deviation or the IQR? Explain briefly.Data From Exercise 10The study in Exercise 9 actually measured the bicep circumference
Fifty-nine countries won gold medals in the 2016 Summer Olympics. The table lists them, along with the total number of gold medals each won.a) Try to make a display of these data. What problems do
The Yale Program on Climate Change Communication surveyed 1263 American adults in March 2015 and asked them about their attitudes on global climate change. Here’s a display of the percentages of
The histogram shows the carbohydrate content of 77 breakfast cereals (in grams).a) Describe this distribution.b) If you can, open the data set and identify the cereals with the highest carbohydrate
The Centers for Disease Control and Prevention lists causes of death in the United States during 2014:a) Is it reasonable to conclude that heart or lung diseases were the cause of approximately
The movie genres listed in Exercise 35 were originally listed as these:a) What problem would you encounter in trying to make a display of these data?b) How did the creators of the bar chart in
Test scores from a large calculus class of 400 are shown in the histogram below.a) Describe the distribution of scores. What might account for this shape?b) Why might both the mean and median score
An article in the Winter 2003 issue of Chance magazine (www.chance.amstat.org) reported on the Houston Independent School District’s magnet schools programs. Of the 1755 qualified applicants, 931
Test scores from a calculus section of 40 students are shown in the histogram below.Describe the distribution of scores. Why might you be less sure of the description of the shape as compared to the
Using the data from Exercise 56, write up a short report describing the distribution of the number of deaths in the United States from tornadoes during this time period.Data From Exercise 56Here are
The histogram shows the distribution of the prices of plain pizza slices (in $) for 156 weeks in Dallas, TX.Which summary statistics would you choose to summarize the center and spread in these data?
Here are the annual numbers of deaths from floods in the United States from 1995 through 2015:Find these statistics:a) Meanb) Median and quartilesc) Range and IQR 80, 131, 118, 136, 68, 38, 48, 49,
Here are the annual numbers of deaths from tornadoes in the United States from 1995 through 2015:Find these statistics:a) Meanb) Median and quartilesc) Range and IQR 30, 25, 67, 130, 94, 41, 40, 55,
Using the data from Exercise 55, write a short report describing the distribution of the number of deaths in the United States from floods during this time period.Data From Exercise 55Here are the
The display shows the average drive distance (in yards) for 199 professional golfers during a week on the men’s PGA tour in 2015.a) Describe this distribution.b) Approximately what proportion of
Exercise 64 looked at distances PGA golfers can hit the ball. The standard deviation of these average drive distances is 11.2 yards, and the quartiles are Q1 = 282.05 yards and Q3 = 294.5 yards.a)
The histogram shows the neck sizes (in inches) of the 250 men recruited for the health study in Utah from Exercise 9.Which summary statistics would you choose to summarize the center and spread in
Alex Rodriguez (known to fans as A-Rod) was the youngest player ever to hit 500 home runs. Here is a stem-and leaf display of the number of home runs hit by A-Rod during the 1994–2016 seasons.
Look again at the histogram of men’s neck sizes in Exercise 60.a) Is the mean closer to 14, 15, or 16 inches? Why?b) Is the standard deviation closer to 1 inch, 3 inches, or 5 inches? Explain.Data
Students were asked to make a histogram of the number of home runs Alex Rodriguez hit from 1994 to 2016 (see Exercise 73). One student submitted the following display:a) Comment on this graph.b)
The histogram shows total gross earnings (in millions of dollars) of the top 200 major release movies in 2015.An industry publication reports that the typical movie makes $23.2 million, but a

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