probability and statistics released sols. how many of the sections of the spinner shown below should...

Probability and Statistics

Released SOLs

How many of the sections of the spinner shown below should be colored blue in order to make the probability of the arrow landing on blue 0.375 in a single spin?(SOL 8.11)

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32

1. 12. 33. 54. 7

Dave is a member of a bowling league. The table below shows his record for the last 10 games (100 frames) he bowled. Based on his previous record, what is the probability that Dave will bowl a strike in the next frame? (8.12)

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32

1. 3/1002. 3/503. 3/254. 6/25

Each year the church youth group has a car wash and donates the earnings to the food pantry. Which amount is closest to the mean earnings over this period? (SOL 8.12)

$300 $500 $700 $800

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32

1. $3002. $5003. $7004. $800

The graph shows the annual sales for the Gambit Novelty Company since 1975. Which is the best prediction for sales in the year 2005? (SOL 8.12)

$375,000 $400,000 $425,000 $450,000

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30 31 32

1. $375,0002. $400,0003. $425,0004. $450,000

In a bag of candies there are 13 red candies, 13 green candies, 13 yellow candies, and 13 blue candies. If you choose 1 candy from the

bag, what is the probability the candy will not be blue? (8.11)

1 2 3 4 5 ¼

½

2/3

¾

25% 25%25%25%

A. ¼ B. ½ C. 2/3 D. ¾

2004

The list shows the scores made by each member of Jaime’s discussion group on the last test.

71 80 62 93 68 87 73 78Which stem-and-leaf plot correctly displays the information?

(8.12)

1 2 3 4 5

25% 25%25%25%

A. B.

C. D.

2004

A. AB. BC. CD. D

What was the daily average (mean)number of lunches sold during the week? (8.12)

1 2 3 4 5

25% 25%25%25%

A. 225B. 250C. 270D. 290

2004

Which scattergram shows the relationship between the amount of gasoline in an automobile’s tank and the distance traveled since the

last fill-up? (8.12)

1 2 3 4 5 A B C D

25% 25%25%25%

A. B.

C. D.

2004

A. AB. BC. CD. D

Nicole listed her homework scores from her mathematics class.

100, 97, 95, 80, 88, 84, 96, 60, 78, 83Which box-and-whisker plot correctly displays

the information? (8.12)

1 2 3 4 5

25% 25%25%25%A.

B.

C.

D.

A. AB. BC. CD. D

2004

This shows all the different ways a pair of number cubes can land in a game Robbie is playing. To win on his next turn, he needs to roll an 8. What is the

probability that Robbie will win on his next turn? (8.11)

1 2 3 4 5

25% 25%25%25%

A. 5/36B. 4/72C. 3/36D. 5/35

2004

According to the data in the graph, which would be the most reasonable prediction for the percent of households with CD-ROMs

in their computers in 1998? (8.12)

1 2 3 4 5

25% 25%25%25%

2004

A. 24%B. 36%C. 40%D. 44%

The spinner below is used in a game. In a single spin, what is the probability of the arrow landing on a Green or Blue space?

(8.11)

1 2 3 4 5

25% 25%25%25%

A. ⅛ B. ¼C. ½D. ⅝

2004

Sam listed his scores from history class.84, 86, 83, 78, 92, 87, 92, 90, 88, 86

Which line plot correctly displays his scores? (8.12)

1 2 3 4 5

25% 25%25%25%

A.

B.

C.

D.

A. AB. BC. CD. D

2004

Which matrix has a 2 and a 5 in the same column? (8.13)

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

A. AB. BC. CD. DA. B. C. D.

2007

During basketball practice, Jada attempted 52 free throws and made 16 of them. Based on that rate,

what is the probability that she will make the nextfree throw she attempts? (8.11)

A B C D

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

A. AB. BC. CD. D

2007

Rocky has a 3/140 chance of winning a trip to New York City. Which of the following best

describes Rocky’s chances of winning the trip? (8.11)

It is

certa

in that R

ocky w

...

It is

likely

that R

ocky w

il...

It is

unlikely

that R

ocky ...

It is

impossi

ble that R

oc..

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

A. It is certain that Rocky will win the trip.

B. It is likely that Rocky will win the trip.

C. It is unlikely that Rocky will win the trip.

D. It is impossible that Rocky will win the trip.

2007

Which is a 2-by-6 matrix? (8.13)

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

A. AB. BC. CD. D

A. B.

C. D.

2007

Sandra has a bag of same-sized cookies. The number of cookies and the different animal pictures on the

cookies are listed below. Sandra will choose one cookie at random. What is the probability that the first cookie Sandra chooses will have a picture of a

tiger?

3/26

3/23

1/4 1/3

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

A. 3/26B. 3/23C. 1/4D. 1/3

How many rows does this matrix have?

3 4 7 12

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

A. 3B. 4C. 7D. 12

A spinner consists of six equal regions as shown. If Harrold spins the spinner once, what is the probability that the arrow will land on a

region numbered less than or equal to 2 ?

1/6 1/3 1/2 2/3

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

A. 1/6B. 1/3C. 1/2D. 2/3

The line graph shows the heights of water in a container that Manny recorded over a 5-hour period for a science project. If

the height of the water continues to decrease as shown, which is closest to its height at 6:00 p.m.?

3.00 cm

2.75 cm

1.50 cm

0.25 cm

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

A. 3.00 cmB. 2.75 cmC. 1.50 cmD. 0.25 cm

The bar graph shows the number of absences for several students in Mr. Hide’s class. What is the

mode number of absences for this group of students?

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

A. 13B. 10C. 4D. 3

A store manager displayed the number of bottles of suntan lotion sold during several months in this bar graph. What

percent of the total number of bottles of suntan lotion sold in June, July, and August was sold in July?

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

A. 30%B. 32%C. 40%D. 48%

A bag contains 12 marbles: 5 are orange, 3 are blue, and the rest are red. If one marble is selected at random from the bag, what is the

probability that it will be red or blue?

1/4 1/3 5/1

2 7/1

2

25% 25%25%25%

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

A. 1/4B. 1/3C. 5/12D. 7/12