Exam 1: Picturing Distributions With Graphs

The following histogram shows body temperatures (in degrees Fahrenheit) for 65 healthy adult women. Approximately how many women in the sample have a body temperature lower than 98 degrees Fahrenheit?

The following time plot gives the number of deaths from opioid pain relievers in the years 2001 to 2014. ​ ​ Which of the following statements is TRUE about the data?

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 third variable mentioned?

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 Would it be correct to display these data in a pie chart?

The following histogram shows body temperatures (in degrees Fahrenheit) for 65 healthy adult women. What is the best description of this distribution?

Some variables that were recorded while studying diets of sharks are given below. Which of these variables is not 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. Which of the following statements is correct about these data?

Every month, the Gallup polling organization tracks various health issues in the United States using large national surveys. The following graph shows the estimated percent of American adults sick with a cold between June 2008 and January 2013. ​ ​ Which of the following statements about the data is TRUE?

Here are records of eye color for a random sample of 103 individuals: ? ? Eye color Number of individuals Blue 21 Green 7 Hazel 23 Brown 47 Other 5 This data set is best represented graphically in a

The EPA sends out a survey to learn about people's water-usage habits. Some of the variables to be analyzed are responses to the following questions. Which of these questions leads to categorical responses?

Every month, the Gallup polling organization tracks various health issues in the United States using large national surveys. The following graph shows the estimated percent of American adults who reported exercising regularly (at least 30 minutes on 3 or more days per week) between June 2008 and January 2013. ​ ​ Which of the following statements about the data is TRUE?

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 To which type of graph is this stemplot most similar?

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

The following histogram depicts the prevalence rates of a particular genetic marker in samples among 25 impoverished communities in 2004. In each interval, the left endpoint is included but not the right endpoint, so the class intervals are 10 ≤ rate < 15, 15 ≤ rate < 20, . . . . ​ How many communities have a prevalence rate of 30% or higher?

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 successful jumps are made in the northeast direction. Which of the following statements about these results is TRUE?

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 second variable mentioned?

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

A survey is conducted among students taking a statistics class. Several variables are measured in the survey. Which of the variables listed below is qualitative?

Which of the following is a discrete variable?

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. How many streams are from the Northeast?