A meteorologist is studying the monthly rainfall in a section of the Brazilian rainforest. She recorded the monthly rainfall, in inches, for last year. They were:

10.4, 10.3, 11.7, 11.1, 8.0, 4.4, 2.6, 1.8, 2.5, 4.4, 7.3, 9.5

Calculate the following for the data set:

Mean:

Median:

Mode:

Range:

Mean = average = (sum of numbers) / (count of numbers)

= 84 / 12 = 7

Median

Arrange the numbers from least to greatest

1.8, 2.5, 2.6, 4.4, 4.4, 7.3, 8.0, 9.5, 10.3, 10.4, 11.1, 11.7

The middle numbers are 7.3 and 8. The average of these numbers is 7.65

Mode: Which among the numbers appear more frequently. That is 4.4

Range: 1.8 to 11.7