Categorical or Quantitative Data

Blood type

• Categorical

• Quantitative

Waiting time in a waiting room

• Categorical

• Quantitative

Which could NOT be an example of quantitative variable used as a category for a report?

• The temperature of ocean water below 100M in a report on ocean temperature at depth.

• The average temperature in a city in Hawaii above 95°F in a report on climate change

• The cost of sedans in the US less than $25,000

• The heart rate of a patient in a heart disease study

The National Survey of Adolescent Health interviewed several thousand teens (grades 7 to 12). One question asked was “What do you think are the chances you will be married in the next ten years?” Above is a two-way table of the responses by gender.

What is the percent of females among the respondents ?

• about 46%.

• about 54%.

• 2625

• 4877

The following bar graph shows the distribution of favorite subject for a sample of 1000 students. What is the most serious problem with the graph?

• This distribution should be displayed with a pie chart

• The vertical axis should show the percent of students.

• The vertical axis should start at 0 rather than 100

• The subjects are not listed in the correct order.

Here are the amounts of money (cents) in coins carried by 10 students in a statistics class: 50, 35, 0, 97, 76, 0, 0, 87, 23, 65. To make a stem plot of these data, you would use stems

• 0, 2, 3, 5, 6, 7, 8, 9.

• 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

• 0, 3, 5, 6, 7.

• 00, 10, 20, 30, 40, 50, 60, 70, 80, 90.

The histogram below shows the heights of 300 randomly selected high school students. Which of the following is the best description of the shape of the distribution of heights?

• Roughly symmetric and unimodal

• Roughly symmetric and bimodal

• Roughly symmetric and multimodal

• Skewed to the left

Which of the following is the best reason for choosing a stem plot rather than a histogram to display the distribution of a quantitative variable?

• Stem plots allow you to split stems; histograms don’t.

• Stem plots allow you to see the values of individual observations.

• Stem plots are better for displaying very large sets of data.

• Stem plots make it easier to determine the shape of a distribution.

What is the median for the Online Purchases?

• $58
• $60
• $61
• $64

How many more people live in Rivertop than in Bently?

• 3,000 people
• 8,000 people
• 5,000 people
• 9,000 people