Find the Mean, Median and Mode

Front

What is the mean?

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 mean for the data set: 12, 12, 11, 10, 15?

Back

Add the numbers: 12 + 12 + 11 + 10 + 15 = 60. Divide by the count (5): 60 / 5 = 12.

Front

What is the median?

Back

The median is the middle number in a sorted list of numbers. If there is an even number of observations, the median is the average of the two middle numbers.

Front

How do you find the median for the data set: 30, 25, 23, 33, 35, 29?

Back

First, sort the numbers: 23, 25, 29, 30, 33, 35. There are 6 numbers (even), so the median is (29 + 30) / 2 = 29.5.

Front

What is the mode?

Back

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

Front

How do you find the mode for the data set: 55, 54, 43, 45, 39, 40, 45?

Back

The number 45 appears twice, more than any other number, so the mode is 45.

Front

Can a data set have more than one mode?

Back

Yes, a data set can have multiple modes if two or more numbers appear with the same highest frequency.

Front

What is the mode for the data set: 4, 4, 3, 2, 3, 6, 8?

Back

Both 4 and 3 appear most frequently (twice), so the modes are 4 and 3.

Front

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

Back

If no number repeats, the data set is said to have no mode.

Front

What is the mean for the data set: 30, 25, 23, 33, 35, 29?

Back

Add the numbers: 30 + 25 + 23 + 33 + 35 + 29 = 175. Divide by the count (6): 175 / 6 = 29.17.