State Test Practice Data Analysis & Statistics

Question 1

What is the mean of the following data set: 4, 8, 6, 10, 12?

Accepted Answer

8

Answer

The mean is calculated by adding all values (4+8+6+10+12=40) and dividing by the count (40÷5=8).

Question 2

In a bar graph showing student test scores, what does the tallest bar represent?

Accepted Answer

The most frequent score

Answer

In a bar graph, the height of each bar represents frequency, so the tallest bar indicates the value that occurs most often.

Question 3

What is the mode of the following data set: 3, 7, 7, 9, 15?

Accepted Answer

7

Answer

The mode is the value that appears most often; 7 appears twice while all other values appear only once.

Question 4

What does the median represent in a data set?

Accepted Answer

The middle value when data is ordered

Answer

The median is the middle value when all data points are arranged in ascending or descending order.

Question 5

Which type of graph is best used to show changes over time?

Accepted Answer

Line graph

Answer

Line graphs are designed to display trends and how values change across a time period.

State Test Practice Practice Test