Deck 11: Statistics

Question 1

Last year's total attendance at Long Run High School's football games was 8,325. Decide whether
Descriptive or inferential statistics is being used.

A)Inferential statistics
B)Descriptive statistics

Answer 1

B

Question 2

The average number of students in a class at White Oak University is 22.6. Decide whether
Descriptive or inferential statistics is being used.

A)Descriptive statistics
B)Inferential statistics

Answer 2

A

Question 3

When a population is divided into groups where the members of each group have similar
characteristics and a certain number of members from each group are chosen at random, the result is
called a sample.

Answer 3

stratified

Question 4

A researcher is studying possible grade inflation at colleges. The sample is .

Question 5

A population consists of .

Question 6

In order to obtain a sample, every subject of the population has to have an equal chance of
being selected.

Question 7

When an existing group of subjects that represent the population is used for a sample, it is called a
sample.

Question 8

A researcher is studying possible grade inflation at colleges. The population is .

Question 9

A researcher randomly selected three states and then gathered information from all colleges willing
To release grade information in those states. Identify the sampling method used.

A)Cluster
B)Stratified
C)Random
D)Systematic

Question 10

A sample is taken by numbering each member of the population and then selecting every kth
member, where k is some natural number.

Question 11

A researcher grouped the schools by two-year state schools, four-year state schools, two-year private
Schools, and four-year private schools. The researcher then decided to choose five schools from each
Of those groups. Identify the sampling method used.

A)Stratified
B)Systematic
C)Random
D)Cluster

Question 12

The chance that a person will be robbed in a certain city is 15%. Decide whether descriptive or
Inferential statistics is being used.

A)Descriptive statistics
B)Inferential statistics

Question 13

A bookstore recorded the type of books 30 customers purchased during a weekend sale (R = romance novel, S
= science fiction, N = nonfiction, C = children's fiction). Construct a frequency distribution for the data.

Question 14

The ages of 40 community college students were gathered. Construct a frequency distribution for
the data using five classes.

Question 15

Twenty-five people responded to a questionnaire about what types of pets they had. Construct a
frequency distribution for the data (D = dogs only, C = cats only, B = both,N = neither).

Question 16

A sample is a .

Question 17

A recent study showed that eating garlic can lower blood pressure. Decide whether descriptive or
Inferential statistics is being used.

A)Inferential statistics
B)Descriptive statistics

Question 18

To study the number of credit hours taken by a typical student, Shawna asks the registrar to provide
E-mail addresses for 10 freshmen, 10 sophomores, 10 juniors, and 10 seniors. From each group, she
Asks for one whose student ID ends in 0, one whose ends in 1, and so forth. a. What method of
Sampling did she use?

A)Stratified
B)Systematic
C)Cluster
D)Random

Question 19

A researcher numbered all of the colleges willing to release grade information and chose several of
Them using a random number generator. Identify the sampling method used.

A)Stratified
B)Systematic
C)Cluster
D)Random

Question 20

A researcher numbered all of the colleges willing to release grade information and chose every tenth
One. Identify the sampling method used.

A)Random
B)Systematic
C)Stratified
D)Cluster

Question 21

Construct a stem leaf plot for the following data.

Question 22

Fifty 10-year-olds were monitored to determine the number of hours per week they spent watching
television, surfing the net, and playing video games. The results were used to obtain the frequency
distribution below. Construct a histogram and frequency polygon for the data.

Question 23

To obtain the frequency distribution below, twenty-three babies were monitored for how many times
they cried during the night. Construct a histogram and frequency polygon for the data.

Question 24

Construct a bar graph for the number of stray animals in a certain city.

Question 25

The exam grades of 31 students were used to obtain the frequency distribution below. Construct a
histogram for the data.

Question 26

Fifty people participated in a poll to determine their favorite ice cream flavor. Use the data to
construct a bar graph.

Question 27

Fifty families reported their annual household income (in thousands of dollars). Construct a
frequency distribution for the data using six classes.

Question 28

A small company did a poll of how their employees commuted to work. Use the data to draw a bar
graph.

Question 29

Construct a stem and leaf plot for the following data using whole numbers as stems and the
decimals as leaves.

Question 30

Fifty people participated in a poll to determine their favorite ice cream flavor. Use the data to
construct a pie chart.

Question 31

Construct a pie chart for the following information.

Question 32

The following frequency distribution shows for a certain high school the number of freshmen,
sophomores, juniors, and seniors who smoke. Construct a bar graph for the data.

Question 33

A small company did a poll of how their employees commuted to work. Use the data to draw a pie
chart.

Question 34

The GPAs of 20 students are given below. Construct a stem and leaf plot for the data using whole
numbers as stems and the decimals as leaves.

Question 35

The following frequency distribution shows for a certain high school the number of freshmen,
sophomores, juniors, and seniors who smoke. Construct a pie chart for the data.

Question 36

Construct a bar graph for the following information.

Question 37

Construct a pie chart for the number of stray animals in a certain city.

Question 38

The grades on a college math exam are shown below. Construct a stem and leaf plot for the data.

Question 39

The exam grades of 31 students were used to obtain the frequency distribution below. Construct a
frequency polygon for the data.

Question 40

The frequency distribution below was obtained by monitoring the number of vacation days per year
taken by twenty-five employees. Construct a histogram and frequency polygon for the data.

Question 41

Find the median.

A)38
B)30.5
C)34
D)30

Question 42

Find the midrange.

Question 43

These data represent the number of stray cats in a small town for the years listed. Draw a time series
graph for the data.

Question 44

Provided below are the sizes of 15 farms, in acres, randomly selected from the state of Oregon. Find
The midrange of the sample below.

A)1,321.5 acres
B)329 acres
C)378 acres
D)498 acres

Question 45

These data represent the number of trees in a certain seaside town. Draw a time series graph for the
data.

Question 46

The frequency distribution below was obtained by monitoring the number of vacation days per year
taken by twenty-five employees. Construct a frequency polygon for the data.

Question 47

Find the mean.

A)12.1
B)2
C)5.5
D)29.5

Question 48

These data represent the number of gas stations along a certain 50-mile length of desert road. Draw
a time series graph for the data.

Question 49

Fifty ten-year-olds were monitored to determine the number of hours per week they spent watching
television, surfing the net, and playing video games. The results were used to obtain the frequency
distribution below. Construct a frequency polygon for the data.

Question 50

The exam grades of 31 students were used to obtain the frequency distribution below. Construct a
histogram and frequency polygon for the data.

Question 51

Find the median.

Question 52

Provided below are the sizes of 15 farms, in acres, randomly selected from the state of Oregon. Find
The mean area for these 15 farms.

A)238 acres
B)307 acres
C)466 acres
D)363 acres

Question 53

The frequency distribution below was obtained by monitoring the number of vacation days per year
taken by twenty-five employees. Construct a histogram for the data.

Question 54

These data represent the number of stray dogs in a certain city for the years listed. Draw a time
series graph for the data.

Question 55

Fifty ten-year-olds were monitored to determine the number of hours per week they spent watching
television, surfing the net, and playing video games. The results were used to obtain the frequency
distribution below. Construct a histogram for the data.

Question 56

To obtain the frequency distribution below, twenty-three babies were monitored for how many times
they cried during the night. Construct a histogram for the data.

Question 57

These data represent the number of students attending a high school. Draw a time series graph for
the data.

Question 58

These data represent the number of students enrolled at a community college. Draw a time series
graph for the data.

Question 59

Find the mean.

Question 60

To obtain the frequency distribution below, twenty-three babies were monitored for how many times
they cried during the night. Construct a frequency polygon for the data.

Question 61

The mean, also known as the arithmetic average, is found by .

Question 62

Find the mode.

Question 63

Find the range, variance, and standard deviation for the given data. The table below shows the
Average points scored per game by several intramural softball teams. Round to one decimal place.

A)range: 10.4, variance: 15.4, standard deviation: 3.9
B)range: 10.3, variance: 12.8, standard deviation: 3.6
C)range: 10.3, variance: 15.4, standard deviation: 3.9
D)range: 10.4, variance: 12.8, standard deviation: 3.6

Question 64

The is the value that occurs most often in a data set.

Question 65

Find the range.

Question 66

To find the arrange the data in order from smallest to largest. If the number of data values is
odd, it will be one value in the middle of the ordered list. If the number of data values is even, it will
be the mean of two middle values.

Question 67

Find the mode.

A)7
B)8
C)10.5
D)No mode

Question 68

The is the mean of the smallest and largest values in a data set.

Question 69

Forty new automobiles were tested for fuel efficiency by the Environmental Protection Agency (in
miles per gallon). The individual values and a frequency distribution are displayed below. Find the median, mode, and midrange of the data set.

Question 70

Find the mode.

A)5.6
B)5
C)No mode
D)8

Question 71

Find the variance.

A)391.6
B)84.4
C)9.19
D)70.33

Question 72

The table below lists the average high temperature in degrees Fahrenheit for each month of the year
On a particular island. Find the mode and the median.

A)Modes: 82° and 88°; median: 84.6°
B)Mode: 88°; median: 84.6°
C)Modes: 82° and 88°; median: 84.5°
D)Mode: 88°; median: 84.5°

Question 73

These data represent the grades on a college exam. Find the mean

Question 74

The table below shows the number of arrests in thousands, for the years from 2005 to 2014 in a
Particular country. Find the mean and sample standard deviation for the number of arrests. Include
Units.

A)mean: 559,000 arrests; standard deviation: 51,509 arrests
B)mean: 571,500 arrests; standard deviation: 49,796 arrests
C)mean: 571,500 arrests; standard deviation: 47,240 arrests
D)mean: 559,000 arrests; standard deviation: 48,866 arrests

Question 75

Forty new automobiles were tested for fuel efficiency by the Environmental Protection Agency (in
Miles per gallon). The individual values and a frequency distribution are displayed below. Use the frequency distribution to approximate the mean.

A)25.15
B)25
C)14
D)25.25

Question 76

Five hundred college graduates were asked how much they donate to their alma mater on an annual
Basis. Find the mode of their responses, summarized in the table.

A)125
B)195
C)The mode does not exist
D)Nothing

Question 77

Find the variance and standard deviation.

Question 78

Provided below are the sizes of 15 farms, in acres, randomly selected from the state of Oregon. The
mean of this sample is 512 acres. a. Find the median of the sample and compare it to the mean and discuss the difference.
b. Find the mean and the median if you throw out the 3,200 acre farm which has the largest area by
far. What does this tell you?

Question 79

Find the standard deviation.

A)12.90
B)138.67
C)166.4
D)11.78

Question 80

Find the mean, median, mode, and midrange for the data provided. The data shows hours spent at
Work for a group of men.

A)mean: 45, median: 46.575, mode: 45.5, midrange: 33.6
B)mean: 46.575, median: 45, mode: no mode, midrange: 45.5
C)mean: 45, median: 46.575, mode: 45, midrange: 33.6
D)mean: 46.575, median: 45.5, mode: no mode, midrange: 45.5