2 Calculate mean, median, mode, and range

What is the mean? If the answer is a decimal, round it to the nearest tenth.

To calculate the mean, you add all the numbers together and then divide by the total count of numbers. For the given data:

77 + 67 + 80 + 74 + 78 + 72 + 74 + 72 + 90 = 675

There are 9 numbers, so the mean is:

Mean = 675 / 9 = 75.0 (rounded to the nearest tenth)

Now, let’s find the median. First, arrange the numbers in ascending order:
67, 72, 72, 74, 74, 77, 78, 80, 90. Since there are 9 numbers (an odd amount), the median is the middle number, which is the 5th number:

Median = 74.

The mode is the number that appears most frequently in the dataset. Both 72 and 74 appear twice:

Mode = 72 and 74.

Finally, to calculate the range, subtract the smallest number from the largest number:

Range = 90 - 67 = 23.

So, the answers are:
Mean = 75.0, Median = 74, Mode = 72 and 74, Range = 23.