Statistics and Data

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, the median is the average of the two middle numbers.

Front

Can a data set have more than one mode?

Back

Yes, a data set can have more than one mode if multiple values appear with the same highest frequency.

Front

What is the third quartile (Q3) of a data set?

Back

The third quartile is the value that separates the highest 25% of the data from the rest. It is the median of the upper half of the data.

Front

How do you calculate the mean of a data set?

Back

To calculate the mean, add all the numbers in the data set and then divide by the total number of values.

Front

What percent of the data is at least a certain value?

Back

To find the percent of data that is at least a certain value, count how many values are greater than or equal to that value, divide by the total number of values, and multiply by 100.

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 range in statistics?

Back

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

Front

What is a frequency distribution?

Back

A frequency distribution is a summary of how often each value occurs in a data set.

Front

What is a histogram?

Back

A histogram is a graphical representation of the frequency distribution of a data set, using bars to show the number of occurrences of each value.

Front

What is a box plot?

Back

A box plot is a graphical representation that shows the distribution of a data set based on a five-number summary: minimum, first quartile, median, third quartile, and maximum.