Central Measures

Front

What is the mode in a data set?

Back

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

Front

How do you find the median of a data set?

Back

To find the median, arrange the numbers in order and identify the middle value. If there are two middle values, calculate their average.

Front

What does the term 'range' refer to in statistics?

Back

The range is the difference between the highest and lowest values in a data set.

Front

What is the average of a data set?

Back

The average (mean) is calculated by adding all the numbers in the data set and dividing by the total 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.

Front

What does it mean if a data set has two modes?

Back

If a data set has two modes, it is called bimodal, indicating that two values appear with the highest frequency.

Front

How do you determine if a data set is skewed?

Back

A data set is skewed if the values are not symmetrically distributed around the mean.

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 the data set.

Front

What is the first step in calculating the average?

Back

The first step is to add up all the numbers in the data set.

Front

What is the significance of the upper quartile?

Back

The upper quartile (Q3) is the median of the upper half of the data set, representing the 75th percentile.