AP Stats Data Visualization and Interpretation 2

Question 1

A back-to-back stemplot compares the test scores of two classes. Class A has a median of 82 and Class B has a median of 75. Which conclusion is best supported?

Accepted Answer

Typical scores in Class A are higher than in Class B.

Answer

The median represents the typical (middle) value, so Class A's higher median indicates its typical scores are higher.

Question 2

A cumulative relative frequency plot (ogive) shows that the 60th percentile corresponds to a value of 45. What does this mean?

Accepted Answer

60% of the data values are at or below 45.

Answer

The 60th percentile means 60% of data values fall at or below that value (45).

Question 3

Which graphical display is MOST useful for identifying whether a quantitative variable follows a roughly normal distribution?

Accepted Answer

Histogram or dotplot

Answer

Histograms and dotplots show the shape of a distribution, making it easy to assess symmetry and bell shape.

Question 4

A time series plot of monthly sales shows an overall upward trend with a repeating seasonal dip every December. This pattern is best described as:

Accepted Answer

A trend with seasonal variation.

Answer

An overall directional movement (trend) combined with a repeating pattern within each year is called trend with seasonal variation.

Question 5

In a dotplot of 30 values, a single dot appears far to the right, separated from the main cluster. This point is most likely:

Accepted Answer

A potential outlier.

Answer

A point separated from the main cluster of data is characteristic of an outlier.

AP Practice Test

AP Practice Test

AP Stats Data Visualization and Interpretation 2