Free Printable Math 7: Review of Probability & Basic Statistics

1.

What is the range?

a)

The number in the middle

b)

The biggest number MINUS the smallest number

c)

The number that appears most often

d)

The average

2.

What is the median?

a)

The number that appears most often

b)

The average

c)

The number in the middle when the numbers are in order from least to greatest.

d)

The biggest number MINUS the smallest number

3.

What is the mode?

a)

The number in the middle

b)

The number that appears most often

c)

The average

d)

The biggest number MINUS the smallest number

4.

To find the average, or mean, of a set of numbers, add up all the numbers and divide by

a)

The smallest number

b)

The number of items in the set

c)

The largest number

d)

The biggest number MINUS the smallest number

5.

A data set can have more than one mode

a)

True

b)

False

6.

When you are finding the MEDIAN and 2 numbers are in the middle, what do you do?

a)

Add the two numbers together and divide by 2

b)

List both of the numbers as the Median

c)

Pick the one that you want

d)

The biggest number MINUS the smallest number

7.

Roger bowled 7 games last weekend.

His scores are: 127, 138, 142, 155, 165, 172, and 193.

What is the range of Roger's scores?

a)

193

b)

127

c)

66

d)

156

8.

The mode score on a test was 94!

Which is true?

a)

99 was the highest score

b)

No one scored below 50

c)

More students received a 94 than any other score

9.

The number of miles Jenna ran each week is shown:

28, 31, 36, 36, 42, 48, 52

What is the median number of miles Jenna ran?

a)

24

b)

39

c)

36

d)

42

10.

The number of miles Jenna ran each week is shown:

28, 31, 36, 36, 42, 48, 52

What is the median number of miles Jenna ran?

a)

24

b)

39

c)

36

d)

42

11.

To find the median, you must put the data in order from least to greatest first.

a)

True

b)

False

12.

Dr. Dre is a dentist.

He must report on the average (mean) number of cavities his patients have.

1, 0, 1, 5, 0, 3, 4

What is the average number of cavities?

a)

7

b)

1

c)

2

13.

At Donald's Donuts, the number of donut holes in a bag can vary.

Help Donald find the MODE.

12, 10, 10, 10, 13, 12, 11, 13, 10

a)

10

b)

12

c)

10 and 12

d)

No mode

14.

The heights of some students are given in centimeters.

158, 159, 164, 164, 167, 172

What is the RANGE of the heights?

a)

16 cm

b)

14 cm

c)

158 cm

d)

15

15.

What is the MEDIAN of this set of data?

10, 20, 30, 40, 50, 60, 70, 80, 90, 100

a)

50

b)

60

c)

55

16.

Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Ervin's scores?

a)

193

b)

127

c)

60

d)

66

17.

Christian has six grades from tests and IXL. They are all weighted equally. If Christian's grades are 100, 96, 96, 88, 70, and 100, what is the current average grade? (Round to the nearest whole number)

a)

90

b)

91

c)

92

d)

93

18.

The number of pages that Carolyn wrote in her journal each day from Monday to Friday is shown below:
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?

a)

5

b)

6

c)

9

d)

11

19.

The mean weight of 8 girls in a group is 35 kg. The individual weights of seven of them are 35kg, 28kg, 43kg, 25kg, 33kg, 51kg, and 22kg. Find the weight of the 8th girl.

a)

39 kg

b)

41 kg

c)

43 kg

d)

45 kg

20.

The number of miles that Kiki cycled each week for a 7-week period is shown:
36, 42, 28, 52, 48, 36, 31
What is the median number of miles Kiki cycled?

a)

24

b)

36

c)

39

d)

52

21.

What is the probability of spinning green?

a)

0

b)

1/4

c)

1/2

d)

3/4

22.

The letters that form the word ALGEBRA are placed in a bowl. What is the probability of choosing a letter other than “A”?

a)

2/7

b)

5/49

c)

5/7

d)

10/49

23.

Ryan has 4 rap songs, 11 pop songs, 8 country songs, and 2 rock songs. What is the probability of Ryan picking a rock song or a pop song?

a)

2/25

b)

13/25

c)

11/25

d)

22/25

24.

Suppose there are 200 students in the cafeteria during lunch. How many students would you expect to choose pizza as their favorite cafeteria food?

a)

90

b)

104

c)

18

d)

72

25.

If a dice is rolled 300 times, how many times would you predict a roll of a 1 or a 6?

a)

50

b)

100

c)

150

d)

75

26.

If you spin the spinner 90 times, how many times should the number 3 be selected?

a)

9

b)

15

c)

16

d)

30

27.

Bailey tossed a coin 10 times. The results were 7 heads and 3 tails.

What is the experimental probability of tossing tails?

a)

1/3

b)

3/10

c)

3/7

d)

1/2

28.

Use the spinner to find the probability.

P(not D) =

a)

5

b)

5/6

c)

0.63

d)

1/6

29.

A veterinarian has the animals listed in the table below staying at the hospital. Find the probabilities of what animal the veterinarian will care for next:

P(cat or reptile) =

a)

11/24

b)

5/11

c)

1/2

d)

10/22

30.

The Probability of an event is .21. Descirbe the likelihood of the event.

a)

Certain

b)

Likely

c)

Unlikely

d)

Impossible

31.

The probability of an event is 0.74. Describe the likelihood of the event.

a)

Certain

b)

Likely

c)

Equally likely/unlikely

d)

Unlikely

e)

Impossible

32.

The cafeteria is serving three kinds of sandwiches: tuna (T), chicken, (C), and peanut butter (P). They are also serving a choice of two drinks: milk (M) or water (W). Which shows the complete set of possible combinations?

a)

TW,CW,PW

b)

TW, TM, TC, CW, PW

c)

TW, TM, CW, CM, PW, PM

d)

TCP, MW

33.

When calculating experimental probability, as more trials are conducted, the experimental probability generally gets closer to the theoretical probability. Eventually, the experimental probability will equal theoretical probability.

a)

True

b)

False

34.

In a random survey of 50 students at Great Middle School, 32 said chocolate was their favorite flavor of yogurt. The school has 450 students. How many of them are likely to select chocolate as their favorite flavor?

a)

144

b)

162

c)

225

d)

288

35.

A principal randomly chose 40 students from grade 5. Of these students, 9 were wearing watches. Based on this information, what is the most reasonable prediction of the number of students wearing watches in a group of 120 students from grade 5?

a)

27

b)

9

c)

18

d)

80

36.

What is the probability of pulling a red marble out of a jar of marbles that have 10 green marbles, 7 red marbles and 3 blue marbles?

a)

1/7

b)

7/20

c)

7/10

d)

3/10

37.

How many total outfit options are represented?

a)

12

b)

22

c)

3

38.

How many outcomes are there with tossing a coin and rolling a dice?

a)

2

b)

6

c)

12

d)

24

39.

What is the possibility of tossing a coin four times and getting tails each time?

a)

1/16

b)

1/8

c)

1/2

d)

1/4

40.

There are 6 red marbles, 5 green marbles, and 4 yellow marbles in a bag. If Joe picks 2 marbles one after the other without replacement, then what is the probability that both are red in color?

a)

2/5

b)

1/21

c)

4/25

d)

1/7

41.

The questions on a multiple choice test each have 6 answer choices. Which model can be used to simulate randomly selecting the correct answer on a 20 question multiple choice test?

a)

rolling a six-sided number cube 6 times

b)

rolling a six-sided number cube 20 times

c)

spinning a spinner with 4 equal sized sections 4 times

d)

choosing 1 marble in a bag of 20 different colored marbles

42.

A cereal company is placing one of 6 different tickets into its boxes of cereal. If each ticket is equally likely to appear in a box of cereal, which model could be used to simulate the tickets you would find in 50 boxes of cereal?

a)

a coin that is flipped 50 times

b)

a spinner that has 4 sections that is spun 50 times

c)

a number cube that is rolled 50 times

d)

a coin is flipped and a number cube is rolled 50 times

43.

The probability of an event is 67%.

Describe the likelihood of the event

a)

Certain

b)

Likely

c)

Equally likely/unlikely

d)

Unlikely

e)

Impossible

44.

The Probability of an event is .21. Descirbe the likelihood of the event.

a)

Certain

b)

Likely

c)

Unlikely

d)

Impossible

45.

The probability of an event is 0.74. Describe the likelihood of the event.

a)

Certain

b)

Likely

c)

Equally likely/unlikely

d)

Unlikely

e)

Impossible

46.

The cafeteria is serving three kinds of sandwiches: tuna (T), chicken, (C), and peanut butter (P). They are also serving a choice of two drinks: milk (M) or water (W). Which shows the complete set of possible combinations?

a)

TW,CW,PW

b)

TW, TM, TC, CW, PW

c)

TW, TM, CW, CM, PW, PM

d)

TCP, MW

47.

When calculating experimental probability, as more trials are conducted, the experimental probability generally gets closer to the theoretical probability. Eventually, the experimental probability will equal theoretical probability.

a)

True

b)

False

48.

In a random survey of 50 students at Great Middle School, 32 said chocolate was their favorite flavor of yogurt. The school has 450 students. How many of them are likely to select chocolate as their favorite flavor?

a)

144

b)

162

c)

225

d)

288

49.

A principal randomly chose 40 students from grade 5. Of these students, 9 were wearing watches. Based on this information, what is the most reasonable prediction of the number of students wearing watches in a group of 120 students from grade 5?

a)

27

b)

9

c)

18

d)

80

50.

What is the probability of pulling a red marble out of a jar of marbles that have 10 green marbles, 7 red marbles and 3 blue marbles?

a)

1/7

b)

7/20

c)

7/10

d)

3/10

51.

There are 6 red marbles, 5 green marbles, and 4 yellow marbles in a bag. If Joe picks 2 marbles one after the other without replacement, then what is the probability that both are red in color?

a)

2/5

b)

1/21

c)

4/25

d)

1/7

52.

Gabe took a survey of students in his school to see how many have a pet. He surveyed 48 students, and 30 said they have a pet. Based on Gabe’s survey, if there are 600 students in his school, he might expect ____ of them to have a pet.

a)

375

b)

96

c)

160

d)

348

53.

Morgan rolled a number cube 20 times. The cube landed on the number 6 five times. What is the experimental probability that Morgan will roll a number 6 the next time she rolls the number cube?

a)

3/10

b)

1/4

c)

1/6

d)

1/5

54.

Cole spun the spinner twice. What’s the probability of the spinner landing on the 3 twice in a row?

a)

1/4

b)

1/36

c)

1/6

d)

2/3

55.

Sama tracked the hours of sleep that she got over the course of a week: 10, 9, 7, 9, 9, 7, 6 Which is a reasonable prediction of the mean number of hours of sleep that Sama gets in a night?

a)

7

b)

8

c)

9

d)

10

56.

On a 6-sided die, which is more likely?

a)

Rolling an odd number

b)

Rolling an even number

c)

They are both equally likely.

57.

Probability can be written as ...

a)

a fraction

b)

a decimal

c)

a percent

d)

all of the above

58.

A box has 3 limes, 5 grapes, and 2 oranges.

P (NOT lime)

a)

3/10

b)

30%

c)

7/10

d)

Answer Not Here

59.

200 children attended the school play. Of the total attendance, 40% were boys. How many girls attended the school play?

a)

800

b)

180

c)

80

d)

120

60.

The tree diagram shows the outcomes of rolling a die and flipping a coin.
How many total outcomes are there?

a)

6

b)

12

c)

24

d)

36

Math 7: Review of Probability & Basic Statistics

Total questions: 60

Worksheet time: 2hrs 59mins

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