Mean, median, and mode

Front

What is the mean (average) of a set of numbers?

Back

The mean is calculated by adding all the numbers in a set and dividing by the total count of numbers.

Front

How do you calculate the median of a set of numbers?

Back

To find the median, arrange the numbers in ascending order and identify the middle number. If there is an even number of values, the median is the average of the two middle numbers.

Front

What is the mode of a set of numbers?

Back

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

Front

If the mean of three numbers is 11 and two of the numbers are 9 and 14, what is the third number?

Back

10

Front

What is the relationship between mean, median, and mode in a normal distribution?

Back

In a normal distribution, the mean, median, and mode are all equal.

Front

How can you determine if a number is the median in a data set?

Back

The median is the middle value when the data set is ordered. If the data set has an odd number of values, it's the center one; if even, it's the average of the two center values.

Front

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

Back

A data set has no mode if no number appears more than once.

Front

If the mean of a set of numbers is 18 and two of the numbers are 16 and 12, what is the third number?

Back

26

Front

What is the effect of outliers on the mean?

Back

Outliers can significantly affect the mean, making it higher or lower than the central tendency of the rest of the data.

Front

How do you find the mode in a data set with multiple modes?

Back

If a data set has more than one mode, it is called bimodal or multimodal, depending on the number of modes.