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The cholesterol levels ( in milligrams per liter) of three randomly selected adult males is 260,...

The cholesterol levels ( in milligrams per liter) of three randomly selected adult males is 260, 315, 295. The standard error of the mean of these three levels is
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Answer #1

Solution:- Given that sample = 260, 315, 295

standard error = standard deviation/sqrt(n)

= 27.8388/sqrt(3)

= 16.0727

Standard deviation:-

Explanation To find standard deviation we use the following formula , Σ(n x) We will compute this formula in 4 steps. Step 1: Find the mean. In this example: X 290 (use this calculator for step by step explanation on how to find mean). Step 2: Create the following table. data 280 315 295 data-mean -30 25 900 625 25 Step 3: Find the sum of numbers in the last column to get X1550 Step 4: Calculate σ using the above formula. 27.8388

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