Stats Review

Front

What is Q1 in a data set?

Back

Q1, or the first quartile, is the value that separates the lowest 25% of the data from the rest. It is the median of the lower half of the data set.

Front

How do you calculate the mean of a data set?

Back

The mean is calculated by adding all the values in the data set and dividing by the number of values.

Front

What is the equation to find the Interquartile Range (IQR)?

Back

IQR = Q3 - Q1, where Q3 is the third quartile and Q1 is the first quartile.

Front

How do you determine the range of a data set?

Back

The range is calculated by subtracting the smallest value from the largest value in the data set.

Front

What is a qualitative variable?

Back

A qualitative variable is a categorical variable that describes characteristics or qualities, such as favorite movie or color.

Front

What is a quantitative variable?

Back

A quantitative variable is a numerical variable that can be measured or counted, such as shoe sizes or weekly income.

Front

What does it mean if a data set is skewed?

Back

A skewed data set is one that is not symmetrical and has a longer tail on one side, indicating that the data is not evenly distributed.

Front

What is the median of a data set?

Back

The median is the middle value when the data set is ordered from least to greatest. If there is an even number of values, it is the average of the two middle values.

Front

What is a mode in statistics?

Back

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

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.