BMST Data Interpretation and Probability 5

Question 1

A bar graph compares sales in Q1 and Q2. Q1=$45,000 and Q2=$54,000. What is the percent increase from Q1 to Q2?

Accepted Answer

20%

Answer

Percent increase = (54,000−45,000)/45,000 × 100 = 9,000/45,000 × 100 = 20%.

Question 2

A weather report states a 30% chance of rain on Saturday and 40% chance on Sunday. Assuming independence, what is the probability it rains on both days?

Accepted Answer

12%

Answer

P(both) = 0.30 × 0.40 = 0.12 = 12%.

Question 3

Data: 14, 22, 18, 35, 20. After removing the outlier 35, what happens to the mean?

Accepted Answer

It decreases

Answer

Removing a value above the mean pulls the mean down; original mean=21.8, new mean=18.5.

Question 4

A Venn diagram shows 20 students like soccer, 15 like basketball, and 8 like both. How many students like only soccer?

Accepted Answer

12

Answer

Students who like only soccer = 20 − 8 = 12.

Question 5

A quality control chart shows 2% of items are defective on average. In a batch of 500 items, how many are expected to be defective?

Accepted Answer

10

Answer

Expected defects = 2% × 500 = 0.02 × 500 = 10.

BMST - Basic Math and Science Test Practice Test

BMST - Basic Math and Science Test Practice Test

BMST Data Interpretation and Probability 5