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Teaching standard deviation using a number line and mean calculation.

$A man writing on a whiteboard explaining standard deviation with a number line and mathematical calculations.$

A man writing on a whiteboard explaining standard deviation with a number line and mathematical calculations.

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Show Answer Key & Explanations Step-by-step solution for: Calculate & Understand the Mean, Median & Mode of Data - [7-6-11 ...

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Final Answer:
19

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Explanation:
The problem is about finding the mean (average) of a set of numbers shown on a number line: 14, 18, 19, 2, 21, and 22.

Step 1: Add all the numbers together.
14 + 18 = 32
32 + 19 = 51
51 + 20 = 71
71 + 21 = 92
92 + 22 = 114

So the total is 114.

Step 2: Count how many numbers there are.
There are 6 numbers.

Step 3: Divide the total by the count:
114 ÷ 6 = 19.

That’s why the mean is 19 — it’s the balance of the data.

Parent Tip: Review the logic above to help your child master the concept of mean of data in math.

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(view all mean of data in math)

$Statistics intro: Mean, median, & mode$