NCDAP Data Analysis & Statistics

Question 1

A student scored 72, 85, 90, 68, and 95 on five tests. What is the mean (average) score?

Accepted Answer

82

Answer

85

Answer

80

Answer

90

Question 2

What is the median of the following data set: 3, 7, 1, 9, 4, 6, 2?

Accepted Answer

4

Answer

3

Answer

6

Answer

5

Question 3

In a data set of 8 values, what is the position of the median?

Accepted Answer

Between the 4th and 5th values

Answer

The 4th value

Answer

The 5th value

Answer

Between the 3rd and 4th values

Question 4

The mode of the data set 5, 8, 3, 5, 9, 2, 5, 8 is:

Accepted Answer

5

Answer

8

Answer

3

Answer

No mode

Question 5

A bar graph shows monthly rainfall. January had 3 inches, February had 5 inches, and March had 4 inches. What was the total rainfall for these three months?

Accepted Answer

12 inches

Answer

10 inches

Answer

15 inches

Answer

9 inches

Question 6

What does the range of a data set measure?

Accepted Answer

The spread between the highest and lowest values

Answer

The most frequently occurring value

Answer

The middle value when data is ordered

Answer

The sum of all values divided by the count

Question 7

A pie chart shows that 40% of students prefer math, 35% prefer English, and the rest prefer science. What percentage prefers science?

Accepted Answer

25%

Answer

30%

Answer

20%

Answer

15%