Stats and Probabilities Unit Review

Probability

100

There are 5 green, 2 orange, and 3 purple slips. What is the probability of drawing an orange?

2/10 or 1/5

200

A 6-sided die is rolled. What is the probability of rolling a 4?

1/6

300

In the word “LUCKY”, what is the probability of picking a vowel, with Y being a consonant? 

1/6 or ~16.7%

400

A black ball is randomly drawn from a set of 6 balls: 2 white, 1 black, 1 grey, 2 striped. What is the probability of drawing a black ball?

1/6 or 16.7%

500

If you pick a random letter from “EXPERIMENT”, what is the probability of picking an E?

3/10 or 30%

Fractions, Decimals, and Percents

100

Convert 1/5 to a percent

20%

200

What is 3/8 as a decimal?

0.375

300

If 2 out of 5 outcomes are favorable, what is the probability as a percent?

40%

400

You have a 1 in 4 chance of winning a prize. Express this as a decimal.

0.25

500

A spinner lands on R with a probability of 2/8. What is this as a percent?

25%

Central Tendency

100

What is the median of: 47, 49, 50, 51, 53, 56?

50.5

200

What is the mean of: 56, 49, 51, 58, 50, 47, 53?

52

300

Find the mode: 72, 88, 79, 84, 88, 91, 76, 83

88

400

Find the mean of: 14, 19, 17, 16, 21, 20, 18

18

500

Mr. Lappin's golf scores: 92, 87, 84, 90, 86. What is his average?

87.8

Range, Mode, and Outliers

100

What is the range of: 22, 24, 28, 25, 29, 23?

7

200

What is the mode of: 31, 34, 31, 30, 35, 34, 34?

34

300

Find the outlier: 23, 25, 27, 26, 90, 24, 28

90

400

Which of the following has the smallest range:
a. 55, 21, 88, 34, 71, 64
b. 40, 85, 36, 91, 62, 59
c. 22, 24, 28, 25, 29, 23?

7

500

Which set has the largest range:
a. 120, 133, 109, 114, 127, 115
b. 300, 290, 320, 280, 310, 299
c. 50, 92, 48, 100, 60, 73?

52

Tree Diagrams and Outcomes

100

How many outcomes are there if a spinner has 3 options and a number cube has 6?

18

200

If James spins P, Q, or R and picks ball 2, 3, 4, or 5, how many total outcomes are there?

12

300

You flip a coin (Heads or Tails) and roll a number cube (1–6). How many outcomes show a Head and an even number?

3 (H2, H4, H6)

400

A restaurant offers 2 types of sandwiches (Chicken or Veggie), 3 drinks (Water, Juice, or Soda), and 2 desserts (Cookies or Fruit). How many possible meal combinations are there?

12 (2 sandwiches × 3 drinks × 2 desserts = 12 outcomes)

500

List all possible outcomes for a spinner (P, Q, R) and balls (2, 3, 4, 5)

P2, P3, P4, P5, Q2, Q3, Q4, Q5, R2, R3, R4, R5