Math Math Statistics and Data Analysis 2

Question 1

A spinner has 8 equal sections numbered 1 through 8. What is the probability of landing on an even number?

Accepted Answer

1/2

Answer

There are 4 even numbers (2,4,6,8) out of 8 total sections: P = 4/8 = 1/2.

Question 2

What is the median of 11, 14, 6, 9, 18, 3?

Accepted Answer

10

Answer

Ordered: 3, 6, 9, 11, 14, 18 — median = (9 + 11) ÷ 2 = 10.

Question 3

In a class of 30 students, 18 play sports. What percent play sports?

Accepted Answer

60%

Answer

Percent = (18 ÷ 30) × 100 = 0.6 × 100 = 60%.

Question 4

A box-and-whisker plot shows Q1 = 20, median = 30, Q3 = 45. What is the interquartile range (IQR)?

Accepted Answer

25

Answer

IQR = Q3 − Q1 = 45 − 20 = 25.

Question 5

Two fair coins are flipped. What is the probability of getting exactly two heads?

Accepted Answer

1/4

Answer

Outcomes: HH, HT, TH, TT — P(HH) = 1/4.

Math Practice Test