7th Grade Statistics & Probability Practice

Front

What is the average?

Back

The average (or mean) is the sum of a set of numbers divided by the count of numbers in the set.

Front

How do you calculate the average score needed for a target average?

Back

To find the score needed for a target average, multiply the target average by the total number of assignments, then subtract the sum of the scores already received.

Front

What is the interquartile range (IQR)?

Back

The interquartile range is the difference between the third quartile (Q3) and the first quartile (Q1) in a data set, representing the range of the middle 50% of the data.

Front

How do you find the median of a data set?

Back

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

Front

What is the range of a data set?

Back

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

Front

What does a dot plot represent?

Back

A dot plot is a simple way to display data using dots to represent the frequency of values in a data set.

Front

What is a quartile?

Back

A quartile is a type of quantile that divides a ranked data set into four equal parts.

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

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.