Description

Is the following a measure on a population or a sample? “38% of ALL the U.S. governors

are Democrats”

A. population

B. sample

2.5 points

QUESTION 2

Is the following set of data qualitative or quantitative? “The number of students enrolled

in each of forty online classes”

A. qualitative

B. quantitative

2.5 points

QUESTION 3

Is the following set of data (types of fabric) qualitative or quantitative? [cotton, wool,

polyester, angora, silk, satin, linen]

A. quantitative

1.

B. qualitative

2.5 points

QUESTION 4

Zip codes are qualitative or quantitative (hint: same variable type as social security

number, cell numbers, etc.)?

A. quantitative

B. qualitative

2.5 points

QUESTION 5

Is the following set of data discrete or continuous? “The number of goals in a soccer

game” (Hint: counted or measured?)

A. discrete

B. continuous

2.5 points

QUESTION 6

Is the following set of data discrete or continuous? “The number of members in

your family”.

A. discrete

1.

B. continuous

2.5 points

QUESTION 7

Is the following set of data discrete or continuous? “The weight of fifteen boxes.”

A. continuous

1.

B. discrete

2.5 points

QUESTION 8

There are 200 students entering an auditorium, every tenth student is given a

survey to fill out, this represents a

A. stratified

1.

sample

B. random sample

C. cluster sample

D. systematic sample

2.5 points

QUESTION 9

There are 200 students in an auditorium. Forty students are to be selected and given a

survey, this represents a

A. stratified sample

B. cluster sample

C. random sample

D. systematic sample

2.5 points

QUESTION 10

Class rank (Freshman, Sophomore, Junior, Senior) represents what level of

measurement?

A. nominal

1.

B. ordinal

C. interval

D. ratio

2.5 points

QUESTION 11

The frequency distribution below contains three errors in the way it was set up.

Identify one of the errors.

2.5 points

QUESTION 12

Identify a second error with the distribution.

2.5 points

QUESTION 13

Identify a third error with the distribution.

2.5 points

QUESTION 14

The histogram below represents the age breakdown of employees at a factory.

How many employees work at the factory?

A. 40

B. 6

C. 152

D. 62

2.5 points

QUESTION 15

In the factory histogram, what is the class width?

A. 5 1.

B. 7

C. 32

D. 4

2.5 points

QUESTION 16

Based on the graph below, how much data is less than 71.5?

A. 75%

B. 5%

C. 45%

D. 71.5%

2.5 points

QUESTION 17

Based on the graph below, what is the class width of the distribution represented?

10

60

7

can’t tell

2.5 points

QUESTION 18

The ogive below represents the low temperatures in a midwestern city over a 50-day

period. For how many days was the low temperature between 15.5 and 25.5 degrees?

(HINT: You are not being asked to give the cumulative frequency at 25.5 but rather the

number of days going from 15.5 to 25.5)

A. 5

B. 20

C. Can’t tell

D. 10

2.5 points

QUESTION 19

In the temperature ogive, what accounts for the largest increase (from 25.5 to

35.5)?

A. That

1. class had the highest temperatures

B. That class had the greatest frequency

C. Can’t tell

D. In an ogive, the biggest jump always occurs before the graph levels off

2.5 points

QUESTION 20

Find the mean of this data set: 3, 11, 5, 23, 8, 11, 2

A. 111.

B. 21

C. 9

D. 23

2.5 points

QUESTION 21

Find the median of this data set: 14, 12, 12, 10, 28, 22, 21, 17

A. 171.

B. 15.5

C. 19

D. 11

2.5 points

QUESTION 22

Find the mode of this data set: 212, 230, 240, 212, 309, 230, 289, 265, 230

A. 230

1.

B. 280.5

C. 309

D. 97

2.5 points

QUESTION 23

Find the midrange of this data set: 3, 9, 4, 6, 2, 2, 8, 11, 1, 5, 6, 5

A. 2 1.

and 5

B. 8

C. 7

D. 6

2.5 points

QUESTION 24

Find the range of this data set: 180, 190, 400, 310, 280, 150, 570, 60

A. 295

1.

B. 510

C. 90

D. 120

2.5 points

QUESTION 25

Find the variance of this population data set: 180, 190, 400, 310, 280, 150, 570, 60

161.05

150.64

25,935.71

22,693.75

2.5 points

QUESTION 26

Explain why the following set of data has no mode. 30, 50, 80, 50, 30, 80

2.5 points

QUESTION 27

Suppose one relatively large value is added to a set of all relatively small data values.

Which of the following measures WOULD NOT be affected (i.e. 10 12 16 12 150 13 which average technique would not be impacted by the outlier)?

A. the mode

B. the range

C. the mean

D. the standard deviation

2.5 points

QUESTION 28

What is Σx 2 for this data set? 5, 10, 2, 9, 8, 9

A. 1849

1.

B. 36

C. 86

D. 355

2.5 points

QUESTION 29

Suppose the variance of a set of data is 251. Find the standard deviation of the

set.

A. 502

1.

B. 63,001

C. 15.84

D. 125.5

2.5 points

QUESTION 30

The frequency distribution below represents the ages of cousins at a large family

reunion. Identify the value of n for the distribution.

A. 6

B. 34

C. 40

D. 11

2.5 points

QUESTION 31

In the “cousin” distribution, identify the modal (the mode for grouped data) class.

A. 10 – 14 and 25 – 29

B. 30 – 34

C. 15 – 19

D. 5 – 9

2.5 points

QUESTION 32

In the “cousin” distribution, find the midpoint for the class 10 – 14.

A. 121.

B. 17

C. 4

D. 6

2.5 points

QUESTION 33

For the frequency distribution below, find the Population MEAN

M (Xm)

f

1.5

30

6.5

0

11.5

10

16.5

2

21.5

10

A. 8.03

B. 7.85

C. 11.5

D. 7.07

2.5 points

QUESTION 34

For the frequency distribution below, find the Population VARIANCE (not the standard

deviation – there is a difference).

M (Xm)

f

1.5

30

6.5

0

11.5

10

16.5

2

21.5

10

A. 50

B. 7.07

C. 8.03

D. 64.53

2.5 points

QUESTION 35

Ages of randomly selected customers visiting Rae-Rae’s Ice Cream Shop between 3:00pm

and 3:15pm.

21 18 17 20 44 16 18 17 14 27

Determine the sample standard deviation for this data set.

21.2

8.75

76.56

449.44

2.5 points

QUESTION 36

The frequency distribution below represents a sample of ages. Calculate the

standard deviation for the distribution

14975

7.500

17.875

56.266

2.5 points

QUESTION 37

The stem-and-leaf displays below show the average mpg figures of the topselling cars at two dealerships. How many top-selling cars are represented in the

displays?

A. 4

B. 40

C. 8

D. 30

2.5 points

QUESTION 38

The box and whiskers display below represents the daily high temperatures (in degrees

Fahrenheit) for a small town over the course of last year. Identify the median of the

temperatures represented.

A. 50

B. 60

C. 20

D. 70

2.5 points

QUESTION 39

The box-and-whisker plot below represents a set of high temperatures for a certain city

over the course of one year. From the display, what % of the days had a high

temperature that was 30 degrees or warmer (remember box-and-whiskers uses

quartiles)?

25%

30%

75%

83%

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