12.1 Mean, Median, Mode, Range

Front

What is the definition of mean in statistics?

Back

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

Front

How do you calculate 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 observations, the median is the average of the two middle numbers.

Front

What is the mode of a data set?

Back

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

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

If a data set is: 2, 3, 5, 7, 11, what is the mean?

Back

The mean is (2 + 3 + 5 + 7 + 11) / 5 = 5.6.

Front

Given the data set: 4, 4, 4, 5, 6, what is the mode?

Back

The mode is 4, as it appears most frequently.

Front

What is the median of the following data set: 1, 3, 3, 6, 7, 8, 9?

Back

The median is 6, as it is the middle number in the ordered list.

Front

How do you find the range of the numbers 15, 22, 8, 19?

Back

The range is 22 - 8 = 14.

Front

What does it mean if a data set has no mode?

Back

It means that no number appears more than once in the data set.

Front

What is the mean of the following numbers: 10, 20, 30, 40?

Back

The mean is (10 + 20 + 30 + 40) / 4 = 25.