A. Eight employees of a ast-food chain were given a course in first aid. They obtained these scores on a test administered after the course. Find the range, variance, and standard deviation. 10.11.12.15.16,18,17,19 Formula to be use: Variance = ² = or s² = Standard deviation = Write your final answer here: Range= Sample Size = Mean = Variance= Standard Deviation= S= X 10 12 13 15 16 17 18 19 (x-mean) or d M-1 Ed² 1 Ed²
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Answer:
the standard deviation first required taking the squared deviations from the mean and dividing by n, if it is a population, or n-1, if it is a sample, which this is. Then take the square root of that result.
s=20.3
the terms are 20.4^2+13.4^2+8.4^2+4.4^2+2.4^2+12.4^2+35.6^2+15.6^2+30.6^2+20.4^2=412.04, variance
sd is sqrt (412.04)=20.30
Step-by-step explanation:
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