SAEE Data Collection and Analysis 2

Question 1

Which sampling method gives every member of a population an equal chance of being selected?

Accepted Answer

Simple random sampling

Answer

Simple random sampling ensures each population member has an equal selection probability.

Question 2

A data set has values 4, 8, 8, 10, 20. What is the median?

Accepted Answer

8

Answer

The median is the middle value when data is ordered, which is 8.

Question 3

Which graph type is best for showing the proportion of parts to a whole?

Accepted Answer

Pie chart

Answer

A pie chart displays each category as a slice of the total.

Question 4

What does a correlation coefficient of -0.9 indicate?

Accepted Answer

Strong negative relationship

Answer

A value near -1 indicates a strong negative (inverse) linear relationship.

Question 5

Which measure of central tendency is most affected by an extreme outlier?

Accepted Answer

Mean

Answer

The mean is pulled toward outliers because it uses every value.

SAEE Test Practice Test