CSPA Statistics and Probability Questions and Answers

Question 1

A customer service representative handled the following number of calls over a five-day work week: 25, 30, 22, 28, and 30. What was the mean number of calls handled per day?

Accepted Answer

27

Answer

30

Answer

28

Answer

22

Question 2

A team consists of 7 members with the following ages: 24, 45, 28, 33, 28, 51, 38. What is the median age of the team members?

Accepted Answer

33

Answer

28

Answer

35.3

Answer

51

Question 3

A quality control inspector checks a batch of 200 light bulbs and finds that 8 are defective. If one light bulb is selected at random from the batch, what is the probability that it is defective?

Accepted Answer

4%

Answer

1 in 200

Answer

8%

Answer

1 in 25

Question 4

A project manager for an outdoor construction site records the daily high temperatures (in Celsius) for a week. The recorded temperatures were: 15°C, 18°C, 12°C, 21°C, 20°C, 17°C, and 14°C. What is the range of these temperatures?

Accepted Answer

9°C

Answer

17°C

Answer

21°C

Answer

12°C

Question 5

Review the following sales data for a small business:
- January: $12,000
- February: $15,000
- March: $14,000
- April: $18,000

Which of the following statements is a correct interpretation of the data?

Accepted Answer

The largest month-over-month sales increase occurred between March and April.

Answer

Sales consistently increased every month.

Answer

The total sales for the four-month period were less than $55,000.

Answer

February was the month with the highest sales.

Question 6

A company notices that departments that invested more in new computer hardware also reported higher employee productivity. Which of the following is the most reasonable conclusion from this observation?

Accepted Answer

There is a positive correlation between investment in new hardware and employee productivity.

Answer

The new hardware directly and solely caused the increase in productivity.

Answer

Higher productivity caused the company to invest in new hardware for those departments.

Answer

There is no relationship between hardware investment and productivity.