Learn
While you’ve shown that you can calculate the average yourself, it becomes time-consuming as the size of your dataset increases — imagine adding all of the numbers in a dataset with 10,000 observations.
The R mean()
function can do the work of adding and dividing for you. In the example below, we use mean()
to calculate the average of a dataset with ten values:
example_data <- c(24, 16, 30, 10, 12, 28, 38, 2, 4, 36) example_average <- mean(example_data) print(example_average)
The code above calculates the average of example_data
and saves the value to example_average
. The resulting average of this array is 20
.
Instructions
1.
Use R to calculate the average value of the author_ages
array. Save the result to average_age
and print it.
Does the average age of the authors surprise you? If so, how? Is it older, or younger than you expected?
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