Mean, Median, Mode, Range, & Outlier

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

Front

What is mode in a data set?

Back

The mode is the number that appears most frequently in a data set. A set may have one mode, more than one mode, or no mode at all.

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

What is an outlier in a data set?

Back

An outlier is a value that is significantly higher or lower than the other values in a data set, which can skew the results.

Front

How do you identify an outlier in a set of numbers?

Back

Outliers can be identified using statistical methods such as the interquartile range (IQR) or by visual inspection of a box plot.

Front

What is the formula for calculating the mean?

Back

Mean = (Sum of all values) / (Number of values)

Front

What is the significance of the median in a data set?

Back

The median provides a measure of central tendency that is less affected by outliers and skewed data than the mean.

Front

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

Back

List all numbers and count their frequency; the numbers with the highest frequency are the modes.

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 and located at the center of the distribution.