International Board of Certified Lactation Consultant (IBCLC) Practice Exam

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What is the mean of the following numbers: 1, 2, 3, 4, 5?

The correct answer is: 3.8

To determine the mean of a set of numbers, you first add all the numbers together and then divide the sum by the total quantity of numbers. In this case, the numbers provided are 1, 2, 3, 4, and 5. First, add these numbers together: 1 + 2 + 3 + 4 + 5 = 15. Next, count how many numbers there are, which is 5 in this case. Now, divide the sum by the quantity of numbers: 15 ÷ 5 = 3. Therefore, the correct mean of the numbers 1, 2, 3, 4, and 5 is 3. This process reflects the understanding of how to calculate the mean accurately, highlighting that careful addition and division steps lead to the correct answer, which is 3.