Statistics Review

Front

What is the mean in statistics?

Back

The mean is the average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Front

How does a low score affect the mean of a data set?

Back

A low score decreases the mean of the data set because it lowers the overall average.

Front

What is a box plot?

Back

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

Front

What information can you not determine from a box plot?

Back

You cannot determine the mode (the score that occurs most frequently) from a box plot.

Front

What is the median?

Back

The median is the middle value of a data set when the numbers are arranged in order.

Front

How do you calculate the interquartile range (IQR)?

Back

The IQR is calculated by subtracting the first quartile (Q1) from the third quartile (Q3).

Front

What does a dot plot represent?

Back

A dot plot is a simple way to display data using dots to represent individual data points.

Front

What is an outlier in a data set?

Back

An outlier is a value that is significantly higher or lower than the other values in a data set.

Front

How do you find the median of a data set with an even number of values?

Back

To find the median, average the two middle numbers after arranging the data in order.

Front

What is the difference between mean and median?

Back

The mean is the average of all values, while the median is the middle value when the data is ordered.