Measures of Central Tendency

Front

What is the mean absolute deviation (MAD)?

Back

The mean absolute deviation (MAD) is a measure of the dispersion of a set of data points. It is calculated by taking the average of the absolute differences between each data point and the mean of the data set.

Front

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

Back

To find the average (mean) of a set of numbers, add up all the items and divide by the number of items in the set.

Front

What is the median in a data set?

Back

The median is the middle value in a data set when the numbers are arranged in ascending order. If there is an even number of observations, the median is the average of the two middle numbers.

Front

How do you find the range of a data set?

Back

The range is found by subtracting the smallest number in the data set from the largest number.

Front

What does a lower mean absolute deviation indicate?

Back

A lower mean absolute deviation indicates that the data points are closer to the mean, suggesting more consistency in the data.

Front

What is the mode of a data set?

Back

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

Front

If the data set is 2, 3, 5, 7, 7, 8, what is the mode?

Back

The mode is 7, as it appears most frequently.

Front

What is the difference between mean and median?

Back

The mean is the average of all data points, while the median is the middle value when the data points are sorted.

Front

In the data set 10, 20, 30, 40, what is the mean?

Back

The mean is (10 + 20 + 30 + 40) / 4 = 25.

Front

What is an outlier in a data set?

Back

An outlier is a data point that is significantly different from the other data points in the set, often lying outside the overall pattern.