BMST Data Interpretation and Probability 4

Question 1

A survey of 150 people found 90 own a car, 60 own a bicycle, and 30 own both. How many own neither?

Accepted Answer

30

Answer

20

Answer

40

Answer

50

Question 2

A line graph shows a company's profit doubling each year from $10,000 in Year 1. What is the profit in Year 4?

Accepted Answer

$80,000

Answer

$40,000

Answer

$60,000

Answer

$100,000

Question 3

The probability of event A is 0.4 and event B is 0.3. If A and B are mutually exclusive, what is P(A or B)?

Accepted Answer

0.7

Answer

0.12

Answer

0.58

Answer

1.0

Question 4

A stem-and-leaf plot shows stems 1, 2, 3 with leaves 2,5 | 1,4,8 | 0,3. What is the largest value?

Accepted Answer

33

Answer

38

Answer

30

Answer

35

Question 5

A data set has a mean of 50 and standard deviation of 5. Approximately what percentage of data falls within one standard deviation of the mean?

Accepted Answer

68%

Answer

95%

Answer

99.7%

Answer

50%

Question 6

A jar contains 3 red, 5 blue, and 2 yellow candies. If one is drawn and not replaced, then another is drawn, what is the probability both are blue?

Accepted Answer

2/9

Answer

1/4

Answer

1/5

Answer

5/18

Question 7

A frequency table shows test scores: 60–69 (5 students), 70–79 (12 students), 80–89 (18 students), 90–99 (5 students). What is the modal class?

Accepted Answer

80–89

Answer

70–79

Answer

90–99

Answer

60–69