StatisticsA: Lesson 7: Summarizing and graphing Data Unit test

Kevin asked some of his friends how many hours they had worked during the previous week at their after-school jobs. The results are shown below. Construct a frequency distribution table for the data given using a class width of 1 and starting with the class 0-0.9. What is the frequency of the class 3-3.9?

A.3

On a math test, the scores of 24 students were as follows: 99-67 Construct a frequency distribution table for these test scored and match it with one shown below.

A: Frequency 3,0,12,0,7,0,2

A television manufacturer sold three times as many televisions in 2005 as it did in 1995........

A. Yes, it appears that 9 times as many televisions were sold in 2005 than in 1995.

Identify a potentially misleading characteristic of a bar graph.

A. one scale begins at some value other than zero

What is the maximum height of a bar in a relative frequency histogram?

A.1

A chicken farmer counts the number of eggs each hen lays in a week. The data collected follows 4-7... Select the graph that does not give a fair and accurate representation of the data.

A

The following data show the number of cars passing through a toll booth during a certain time period over 15 days. 18-21. Identify the corresponding dotplot.

A. .| |...|...|...| |..|.|.|.| |

The data show the roundtrip mileage driven to school each dat by 43 randomly selected professors and students.

A. 12,17,22,27,32

The histogram below represents the number of television sets per house hold for a sample of a U.S. households. How many households had three televisions sets?

A. 15

In a local school 34 students are enrolled in a math class, 85 are enrolled in a english class, 58 are enrolled in an art class, and 54 are enrolled in a history class.

A. 53

Frequency polygons use line segments connected to points located directly above what type of values?

A. Class midpoints

A school district performed a study to find the main causes leading to students dropping out of school. Thirty cases were analyzed, and a primary cause was assigned to each case. The causes included unexcused absences (U), illness(I), family problems(F), and other causes (O). The results for the thirty cases are listed below:

A. Frequency 9,9,7,5

The scores on a recent statistics test are given below. Does this table describe a relative frequency distribution? Why or why not? Scores: 0-60,61-70,71-80,81-90,91-100......Relative Frequency: 12.5%18.1%,33.3%,12.2%,10.9%

A. No the sum of the percentages is not 100%

In construction a graph that compares average water usage per household in different communities, you choose to use cubes of different sizes........

A. No, the variable of interest is three-dimensional

Suppose that you construct a histogram and a relative frequency histogram corresponding to a particular frequency table. Identify one way the histograms will differ.

A. The y-axis units will differ

The weights of 22 members of the varsity football team are listed below. 144-171 Identify the corresponding stem and leaf plot.

B. 135,0124478,1223699,04,125

A nurse measure the blood pressure of each person who visited her clinic and created a relative-frequency histogram for the systolic blood pressure readings. Approximately what percentage of the people had a systolic blood pressure reading between 110 and 139 inclusive?

B. 75%

Determine whether the following data should be represented on a graph as one-dimensional, two-dimensional, or three-dimensional. the amount of carpet used in a home

B. two-dimensional

If the preferred vehicle is an SUV, what is the conditional distribution for females? Gender vs. Vehicle Preference

B.54.2%

If a person is tall, what is the conditional distribution of left-handed individuals? Dominant Hand vs. Height

C.9.5%

A nurse measured the blood pressure of each person who visited her clinic and created a relative-frequency histogram for the systolic blood pressure readings. What is the center of the third class, to the nearest whole number?

D. 125

If the preferred vehicle is an SUV, what is the conditional distribution for males? Gender vs. Vehicle Preference

D. 45.8%

The scores on a recent statistics test are given in the frequency distribution below..... Frequency 4,10,12,4,5

D. Relative Frequency 11.43,28.57,34.29,11.43,14.29

What is the marginal distribution for people who prefer sports cars? Gender vs. Vehicle Preference, Total: 203

E. 30.9%

If a person is left handed, what is the conditional distribution of short individuals? Dominant Hand vs. Height

E. 33.3%