APA 8A Review

Front

What is the Interquartile Range (IQR)?

Back

The Interquartile Range (IQR) is a measure of statistical dispersion, representing the range between the first quartile (Q1) and the third quartile (Q3) in a data set.

Front

How do you determine the median of a data set?

Back

To find the median, arrange the data in ascending order and identify the middle value. If there is an even number of values, the median is the average of the two middle values.

Front

What is a box-and-whisker plot?

Back

A box-and-whisker plot is a graphical representation of a data set that displays the minimum, first quartile, median, third quartile, and maximum.

Front

What does it mean if a line is an accurate line of best fit?

Back

A line of best fit accurately represents the trend of the data points in a scatter plot, minimizing the distance between the line and all data points.

Front

What is the mean absolute deviation (MAD)?

Back

The mean absolute deviation (MAD) is the average of the absolute differences between each data point and the mean of the data set.

Front

How do you calculate the mean of a data set?

Back

To calculate the mean, add all the values together and divide by the number of values.

Front

What is the significance of the median in a data set?

Back

The median provides a measure of central tendency that is less affected by outliers than the mean.

Front

What does it mean if the IQR is small?

Back

A small IQR indicates that the middle 50% of the data points are close together, suggesting less variability in the data.

Front

How can you identify outliers in a data set using the IQR?

Back

Outliers can be identified as values that fall below Q1 - 1.5*IQR or above Q3 + 1.5*IQR.

Front

What is the range of a data set?

Back

The range is the difference between the maximum and minimum values in a data set.