Exam 1: Picturing Distributions With Graphs

The following table shows the percent of current smokers in 2006 among various groups, according to the Centers for Disease Control and Prevention. Group Percent who are smoking Men 18-24 years 28.5\% Women 18-24 years 19.3\% Men 25-29 years 28.9\% Women 25-29 years 23.3\% Would it be correct to display these data in a single pie chart?

Opioid pain relievers are prescribed at a higher rate in the United States than in any other nation, yet abuse of these pain relievers can result in addiction and fatal overdoses. The CDC examined opioid pain reliever prescriptions in each U.S. state to determine how variable prescription rates are across the nation. The following time plot gives the number of deaths from opioid pain relievers from 2001 to 2014. What was the number of deaths in 2007?

During winter, red foxes hunt small rodents by jumping into thick snow cover. Researchers report that a hunting trip lasts, on average, 19 minutes and involves, on average, 7 jumps. In a surprising finding, they report that 79% of all successful jumps are made in the northeast direction. Three variables are mentioned in this report. What is the best description of the first variable mentioned?

For a biology lab course containing 10 students, the maximum point total for the quarter was 200. The point totals for the 10 students are given in the following stemplot: 11 68 12 148 13 37 14 26 15 16 17 9 Suppose this stemplot was drawn as a histogram. What would be the best description of the shape of this histogram?

The estimated annual number of smoking-attributable deaths in the United States can be broken down by specific causes, as follows: Lung cancer 128,900 deaths Other cancers 35,300 deaths Ischemic heart disease 126,000 deaths Chronic obstructive pulmonary disease 92,900 deaths Stroke 15,900 deaths Other diagnoses 44,000 deaths What percent of U.S. annual deaths attributable to smoking are lung cancer deaths?

The following graph shows the percent of adults who are overweight or obese in countries with different income levels, based on 2010 data from the World Health Organization and the United Nations. Which of the following statements about these data is correct?

A survey records many variables of interest to the researchers conducting the survey. The following variables are some of the variables collected in a survey conducted by the USDA. Which of these variables is categorical?

A sample of 40 endangered species was obtained, and the length of time (in months) since being placed on the list was recorded for each species. A histogram of these data is given here: Approximately how many species in the sample have been on the list for less than 5 years?

The following histogram shows the yearly number of unprovoked attacks by alligators on people in Florida over a 33-year period. What is the overall shape of the distribution?

The following graph shows the percent of adult hemodialysis patients who received adequate dialysis (urea reduction ratio 65% or greater), by age, over the 2002-2007 period. Which of the following statements about these data is NOT correct?

The following dotplot shows migraine intensity (on a scale of 1 to 10) for 29 adults suffering from recurring migraines. What is the best description of this distribution?

The following graph shows the percent of adults who are overweight or obese in countries with different income levels, based on 2010 data from the World Health Organization and the United Nations. What is the correct description of this graph?

Some variables were recorded while surveying plants in a wildlife area. Which of the following variables is continuous?

The U.S. Global Change Research Program examined data for evidence of global climate change. The following graph shows the average yearly ground temperature at a depth of 65.5 feet (the typical measure of permafrost, indicative of ground frozen solid) between 1978 and 2008 in Deadhorse, a town in northern Alaska. ​ ​ Which of the following statements about the data is TRUE?

What is important to do when drawing a histogram?

The U.S. Global Change Research Program examined data for evidence of global climate change. The following graph shows the yearly number of days without frost (air temperature below freezing) between 1904 and 2008 in Fairbanks, Alaska. ​ ​ Which of the following statements about the data is TRUE?

Stream quality is based on the levels of many variables, including those listed below. Which of these variables is quantitative?

A sample of 55 streams in severe distress was obtained during 2007. The following bar graph illustrates the number of streams that are from the Northeast, Northwest, Southeast, or Southwest. In the bar graph, the bar for the Northeast has been omitted. What percent of streams are not from the Northeast?