There are an infinite supply of sets of numbers with a mean of 30.
Here are a few sets:
29 and 31
28, 29, 31, and 32
28, 29, 30, 31, and 32
10, 20, 30, 40, and 50
10, 20, 21, and 69
1, 2, 3, 4, and 140
-10000, -9000, -8000, -7000, -3000, and 37,180
-1 million and 1,000,030
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10, 10, 20, 30, 30, 50.
Mean is the same as average. To get the mean of a set of numbers: First, you add up all the numbers. Second, you divide by the number of numbers in the set. Total of all the numbers/Number of numbers in the set
The sum of the set of numbers divided by the amount of numbers.
You are finding the mean of the set of numbers.
mean | 30 median | 18 standard deviation | 35.496