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Practice Sheet Mean, Median, Mode, Variance and Standard Deviation

What is the a) mean, b) median, c) mode, d) variance and e) standard deviation? (All answers are to be rounded to 4 decimal places) Sample Mean Step 1: Input the data and information into the mean equation and calculate. J=20. ∑ 𝑥𝑖 𝑖=1 J = 9+4+8+12+5+1+8+18+9+13+18+1+5+10+15+8+15+8+8+5 20 = 180 20 =9 The mean is 9. Median