Measures of Center and Measures of Variation

Front

What is the mean of a set of numbers?

Back

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

Front

What is a statistical question?

Back

A statistical question is one that anticipates variability in the data and can be answered by collecting data.

Front

What do quartiles represent in a data set?

Back

Quartiles are values that divide a data set into four equal parts.

Front

How do you find the Interquartile Range (IQR)?

Back

The Interquartile Range is found by subtracting the first quartile (Q1) from the third quartile (Q3).

Front

What is the range of a set of numbers?

Back

The range is the difference between the highest and lowest values in a data set.

Front

What is the first quartile (Q1)?

Back

The first quartile (Q1) is the median of the lower half of a data set, representing the 25th percentile.

Front

What is the third quartile (Q3)?

Back

The third quartile (Q3) is the median of the upper half of a data set, representing the 75th percentile.

Front

How do you calculate the median of a data set?

Back

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

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.

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.