AP Statistics Unit 1 Review

Front

What is the mean in a normal distribution?

Back

The mean is the average value of a set of data, representing the center of the distribution.

Front

What does a standard deviation indicate in a dataset?

Back

Standard deviation measures the amount of variation or dispersion in a set of values.

Front

What is a z-score?

Back

A z-score indicates how many standard deviations an element is from the mean of the dataset.

Front

What does the 99th percentile represent?

Back

The 99th percentile indicates that a value is higher than 99% of the data points in the distribution.

Front

What is correlation in statistics?

Back

Correlation measures the strength and direction of a linear relationship between two variables.

Front

What does a correlation coefficient of 0.6 imply?

Back

A correlation coefficient of 0.6 implies a moderate positive relationship between the two variables.

Front

What is a segmented bar graph?

Back

A segmented bar graph displays the relative sizes of different categories as segments of a whole bar.

Front

How do you interpret a z-score of 1.50?

Back

A z-score of 1.50 means the value is 1.50 standard deviations above the mean.

Front

What is the empirical rule in statistics?

Back

The empirical rule states that for a normal distribution, approximately 68% of data falls within one standard deviation of the mean.

Front

What is the purpose of a histogram?

Back

A histogram is used to represent the frequency distribution of numerical data.