Measures of Center and Variability (7thDPS11,12)

Front

What is the Median?

Back

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

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How do you find the Range?

Back

The range is the difference between the highest and lowest values in a data set. It shows the spread of the data.

Front

What is the Mean?

Back

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

Front

What is the difference between Mean and Median?

Back

The mean is the average of all values, while the median is the middle value when the data is ordered. The median is less affected by outliers.

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What does it mean if a data set has a high variability?

Back

High variability means that the data points are spread out over a wide range of values, indicating less consistency.

Front

What is a data set?

Back

A data set is a collection of related data points or values, often organized in a table or list.

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 is an Outlier?

Back

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

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What is the purpose of Measures of Center?

Back

Measures of center, like mean, median, and mode, summarize a data set with a single value that represents the center of the data.

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What is the Mode?

Back

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