Answer :
The mean or average of the list of numbers 98.6, 99.0, 98.9, 98.3, 98.7 is 98.7.
The list of numbers provided are: 98.6, 99.0, 98.9, 98.3, 98.7. To find the mean (also known as the average), you need to add all the numbers together and then divide by the number of numbers in the list. So the sum of these numbers is 493.5. As there are 5 numbers in the list, you then divide 493.5 by 5, which gives a mean of 98.7.
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