AP Stats Quarter 1 Review

Front

If a distribution is skewed right, which of the following is usually true?

Back

mean > median

Front

What are influential points?

Back

Points, if removed, change the slope, y-intercept, or correlation.

Front

Given a mean of 75 and a standard deviation of 7, what percentage of scores are above 82?

Back

16%

Front

Interpret the following scatterplot for strength and direction: Positive Strong

Back

A scatterplot where the points show a clear upward trend with little scatter.

Front

Interpret the following scatterplot for strength and direction: Negative Weak

Back

A scatterplot where the points show a slight downward trend with significant scatter.

Front

What does a mean represent in a data set?

Back

The average value of all data points.

Front

What does standard deviation measure?

Back

The amount of variation or dispersion in a set of values.

Front

What is the difference between an outlier and an influential point?

Back

An outlier is a data point that is significantly different from others, while an influential point affects the slope or correlation when removed.

Front

What is a scatterplot used for?

Back

To visualize the relationship between two quantitative variables.

Front

What does a positive correlation indicate?

Back

As one variable increases, the other variable also tends to increase.