Rise Placement Test Statistics and Data Analysis

Question 1

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

Accepted Answer

82

Answer

The mean is the sum divided by the count: (72+85+90+68+95)/5 = 410/5 = 82.

Question 2

What is the median of the data set: 3, 7, 9, 2, 5, 8, 1?

Accepted Answer

5

Answer

Arranging in order: 1, 2, 3, 5, 7, 8, 9 — the middle (4th) value is 5.

Question 3

In the data set {4, 7, 4, 9, 2, 7, 4, 1}, which value is the mode?

Accepted Answer

4

Answer

The mode is the value that appears most frequently; 4 appears three times, more than any other value.

Question 4

What is the range of the following data set: 15, 3, 27, 11, 8?

Accepted Answer

24

Answer

Range = maximum − minimum = 27 − 3 = 24.

Question 5

A bar chart shows that 40 students prefer math, 30 prefer English, and 20 prefer science. What percentage of students prefer English?

Accepted Answer

33.3%

Answer

Total students = 90; English = 30; 30/90 × 100 = 33.3%.

Rise Placement Test Practice Test