Chapter 1: Q 62. (page 47)
Die rolls Imagine rolling a fair, six-sided die times. Draw a plausible graph of the distribution of die rolls. (Hint: Should you use a bar graph or a histogram?)
Chapter 1: Q 62. (page 47)
Die rolls Imagine rolling a fair, six-sided die times. Draw a plausible graph of the distribution of die rolls. (Hint: Should you use a bar graph or a histogram?)
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Get started for freeThe Fathom dot plot displays data on the number of siblings reported by each student in a statistics class.
Describe the shape of the distribution.
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?
Population pyramids A population pyramid is a helpful graph for examining the distribution of a country’s population. Here is a population pyramid for Vietnam in the year . Describe what the graph tells you about Vietnam’s population that year. Be specific.
El Niño and the monsoon It appears that El Niño, the periodic warming of the Pacific Ocean west of South America, affects the monsoon rains that are essential for agriculture in India. Here are the monsoon rains (in millimeters) for the strong El Niño years between and
(a) To make a stem plot of these rainfall amounts, round the data to the nearest 10, so that stems are hundreds of millimeters and leaves are tens of millimeters. Make two stem plots, with and without splitting
the stems. Which plot do you prefer?
(b) Describe the shape, center, and spread of the distribution.
(c) The average monsoon rainfall for all years from to is about millimeters. What effect does El Niño appear to have on monsoon rains?
Comparing car colours Favorite vehicle colours may differ among types of vehicles. Here are data on the most popular colours in for luxury cars and for SUVs, trucks, and vans.
(a) Make a graph to compare colours by vehicle type.
(b) Write a few sentences describing what you see.
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