CHSPE Data Analysis 2

Question 1

A scatter plot shows points clustered tightly around a line that goes from the lower-left to the upper-right. What does this indicate?

Accepted Answer

Strong positive correlation

Answer

Points clustered tightly along an upward-sloping line indicate a strong positive correlation between the two variables.

Question 2

A data set has values: 4, 7, 7, 9, 13. What is the median?

Accepted Answer

7

Answer

When five values are arranged in order, the median is the middle (third) value, which is 7.

Question 3

A survey of 200 students found 50 prefer math. What percentage prefer math?

Accepted Answer

25%

Answer

50 out of 200 = 50/200 = 0.25 = 25%.

Question 4

Which graph is BEST for showing how a city's population changed over 10 years?

Accepted Answer

Line graph

Answer

A line graph is best for showing change over time because it emphasizes trends and continuity.

Question 5

A box plot's interquartile range (IQR) is the distance between which two values?

Accepted Answer

Q1 and Q3

Answer

The IQR is Q3 minus Q1, representing the spread of the middle 50% of the data.

California High School Proficiency Exam Practice Test