Measures of Central Tendency

Front

What is the mean in statistics?

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

How do you calculate the mean of the following numbers: 9, 8, 12, 6, 10?

Back

(9 + 8 + 12 + 6 + 10) / 5 = 9.

Front

What is the mode in a data set?

Back

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

Front

Find the mode of the following data set: 10, 8, 9, 9, 7, 9, 10, 6, 5, 5, 3, 4.

Back

The mode is 9.

Front

What is the median in statistics?

Back

The median is the middle number in an ordered set of data.

Front

How do you find the median of the following numbers: 3, 5, 7, 9, 11?

Back

The median is 7, as it is the middle number.

Front

What is Q1 in a data set?

Back

Q1, or the first quartile, is the median of the lower half of a data set.

Front

Find Q1 for the data set: 74, 70, 75, 90, 85, 86, 81, 78, 92, 86.

Back

Q1 is 75.

Front

What is the range of a data set?

Back

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

Front

Calculate the range of the following numbers: 5, 10, 15, 20, 25.

Back

Range = 25 - 5 = 20.