Statistics Review

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

How do you calculate the range of the data set: 3, 7, 8, 11, 2, 7?

Back

Range = Highest value (11) - Lowest value (2) = 9.

Front

What does it mean if a histogram is skewed right?

Back

A right-skewed histogram has a longer tail on the right side, indicating that most data points are concentrated on the left.

Front

What does it mean if a histogram is skewed left?

Back

A left-skewed histogram has a longer tail on the left side, indicating that most data points are concentrated on the right.

Front

What is the mode of a data set?

Back

The mode is the value that appears most frequently in a data set.

Front

Find the mode of the data set: 7, 3, 6, 4, 7, 3, 5, 3.

Back

Mode = 3, as it appears most frequently.

Front

How do you determine how many people fall into a specific category in a data set?

Back

Count the number of entries that meet the criteria for that category.

Front

If 42 people watched TV last week, and 10 watched more than 25 hours, how many watched 25 hours or less?

Back

42 - 10 = 32 people watched 25 hours or less.

Front

What is a histogram?

Back

A histogram is a graphical representation of the distribution of numerical data, showing the frequency of data points within certain ranges.

Front

What does it mean if a histogram is symmetrical?

Back

A symmetrical histogram has a balanced shape, where the left and right sides are mirror images of each other.