CSET Data Analysis & Reporting 3

Question 1

A dataset has values: 4, 7, 7, 9, 12, 15, 21. What is the interquartile range (IQR)?

Accepted Answer

8

Answer

Q1 = 7 and Q3 = 15, so IQR = 15 - 7 = 8, representing the spread of the middle 50% of data.

Question 2

Which type of data display would best show how a single student's monthly quiz scores changed over an entire school year?

Accepted Answer

Line graph

Answer

A line graph is ideal for showing trends and changes in a variable over continuous time periods.

Question 3

A teacher administers the same standardized test to 30 students and gets highly consistent results each time. This test is said to have high:

Accepted Answer

Reliability

Answer

Reliability refers to the consistency of a test in producing the same results across repeated administrations.

Question 4

In a frequency table, the relative frequency column shows values that should sum to approximately:

Accepted Answer

100 or 1.0

Answer

Relative frequencies represent proportions or percentages of the total, so they sum to 1.0 (or 100%).

Question 5

A student scores at the 75th percentile on a standardized test. This means:

Accepted Answer

The student scored higher than 75% of the norm group

Answer

A percentile rank of 75 means the student performed as well as or better than 75% of the students in the comparison group.

CSET Test Practice Test