Problem

Given the data set {3, 5, 7, 9}, find the quadratic mean (RMS).

Answer

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Answer

Step 3: Take the square root of the result. 41

Steps

Step 1 ：Step 1: Square each value in the data set and find the sum. 32+52+72+92=9+25+49+81=164

Step 2 ：Step 2: Divide the sum by the number of values in the data set. 1644=41

Step 3 ：Step 3: Take the square root of the result. 41

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