Unit Test: Modified

Name______Date______Class______

Statistical Models

Unit Test: Modified

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1

Name______Date______Class______

1.

How many females surveyed read more than 30 minutes per day?

A19

B56

C123

2.

What is the joint relative frequency that a person surveyed likes jazz and country?

A

B

C

3.Suzanne had 100 people fill out a questionnaire about their favorite color. Of those people,45 of the respondents were male. Ten males said yellow was their favorite color. What was the conditional frequency that a participant’s favorite color is yellow, given the person is a male?

A0.10

B0.22

C0.45

4.Data set A has a correlation coefficient of and data set B has a correlation coefficient of 0.3. Which of the following statements is true?

AThe variables from set A have a strong negative correlation.

BThe variables from set A have a low negative correlation.

CThe variables from set B have a strong positive correlation.

5.Which correlation coefficient best matches the data on the scatterplot below?

A0.3

B0.6

C1

6.What is the mean of the data set
{2, 2, 2, 3, 0, 5, 8, 3, 7, 10}?

A4.2

B10

C42

7.What is the outlier of the following set of data:8, 1, 6, 4, 0, 45, 3?

A8

B0

C45

Original content Copyright © by Houghton Mifflin Harcourt. Additions and changes to the original content are the responsibility of the instructor.

1[footer zone 1]

Name______Date______Class______

Statistical Models

Unit Test: Modified

Original content Copyright © by Houghton Mifflin Harcourt. Additions and changes to the original content are the responsibility of the instructor.

1

Name______Date______Class______

8.The frequency table below shows the
ages and gender of the students at Morgan Middle School.

a.Complete the table.

b.How many male students are 1213 years old?

______

c.In all, how many students are 1415years old?

______

d.Are there more males or females at Morgan Middle School? How many more?

______

9.The table shows the results of a survey of the primary mode of transportation of residents of East Palatka, Florida.

a.How many residents were surveyed?

______

b.What is the relative frequency that a resident who was surveyed primarily bikes?

______

c.Thirty of the residents surveyed who ride a bike to work are males. What is the relative frequency that a person surveyed is a male, given that he rides a bike?

______

10.a.Complete the table.

b.Find the sum of the squared residuals.

______

c.A second line of fit has a squared residual of 11. Which line is a better fit to the data?

______

11.Mariarecorded the following data for
the height, in inches, of students in her class:

{70, 68, 66, 61, 72, 67, 71, 62}

a.What is the median of the data?

______

b.What is the mean of the data?

______

6. D

7. a.

b. 187

c. 121

8. a. 0.28

b.

c. 0.4

9. a. 10

3.75

b. The squared residual
is lower.

Unit 4 Test C

1. 20

2. 0.75

3. 0.72

4. A No B Yes C No D Yes

5. A No B Yes C Yes

6.

7. a.

b. 28

c. 14 more 48- to 57-year-olds

8. a.

b. 0.216

c. 0.6

9. a. 7.5

b. Possible answer The
squared residual is 3.75, which is
lower than 7.5.

10.a.

b. The scores of the students in the
afternoon class have a lower median
and a smaller interquartile range than
the scores fromthe morning class.

Unit 4 Test Modified

1. B

2. B

3. B

4. A

5. C

6. A

7. C

8. a.

b. 90

c. 205

d. 20 more females

9. a. 400

b. 0.1875

c. 0.4

10.a.

b. 7

c. the first line of fit,

11.a. 67.125 in.

b. 67.5 in.

Unit 4 Performance Task

1. 60% of 100 students said they had a sister. 60%  100  60

2. Of the 60 students with a sister,
30% had a brother. 30%  60  18

3. There are 100 students altogether.
100  60  40

4. Of the 40 students who do not have a sister, 50% have a brother. 50%  40  20

5. The total of 60 includes 18 who have a brother. 60  18  42

6.

7.

8. 20 percent of the people surveyed has a brother but does not have a sister.

9. The percentage is the higher of the two in the column. This means that those who have a brother are more likely to not have a sister.

UNIT 5 Linear Systems

Unit 5 Test A

1. D

2. (19, 14)

3. C

4. B

5. C

6. (0, 2)

7. 4 months

8. (2, 1)

Original content Copyright © by Houghton Mifflin Harcourt. Additions and changes to the original content are the responsibility of the instructor.

1Holt McDougal Mathematics