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Chapter 1: Q 83. (page 70)
Incomes of college grads According to the Census Bureau, the mean and median income of people at least years old who had a bachelor’s degree but no higher degree were and Which of these numbers is the mean and which is the median? Explain your reasoning.
The mean is
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At the Census Bureau Web site, you can view detailed data collected by the American Community Survey. The table below includes data for 10 people chosen at random from the more than one million people in households contacted by the survey. “School” gives the highest level of education completed.
This data set contains
(a) 7 variables, 2 of which are categorical.
(b) 7 variables, 1 of which is categorical.
(c) 6 variables, 2 of which are categorical.
(d) 6 variables, 1 of which is categorical.
(e) None of these.
Here, once again, is the stem plot of travel times to work for randomly selected New Yorkers. Earlier, we found that the median was minutes.
Interpret your result from Question 2 in context without using the words “mean” or “average".
You look at real estate ads for houses in Naples, Florida. There are many houses ranging from in price. The few houses on the water, however, have prices up to . The distribution of house prices will be
(a) skewed to the left.
(b) roughly symmetric.
(c) skewed to the right.
(d) unimodal.
(e) too high.
Income and education level Each March, the Bureau of Labor Statistics compiles an Annual Demographic Supplement to its monthly Current Population Survey.44 Data on about individuals between the ages of data-custom-editor="chemistry" who were employed full-time were collected in one of these surveys. The boxplots below compare the distributions of income for people with five levels of education. This figure is a variation of the boxplot idea: because large data sets often contain very extreme observations, we omitted the individuals in each category with the top and bottom of incomes. Write a brief description of how the distribution of income changes with the highest level of education reached. Give specifics from the graphs to support your statements.
About million first-year students enroll in colleges and universities each year. What do they plan to study? The pie chart displays data on the percent of first-year students who plan to major in several discipline areas. About what percent of first-year students plan to major in business? In social science?
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