6.4. Applications of Variance and Standard Deviation http://www.ck12.org
74 68 79 84 92 82 55 77 91
100 84 80 99 74 59 88 89 53
70 86 77 100 94 90 88 83 93
62 69 96 85 75 90 81 71 73
Answer:
To find the mean, variance, and standard deviation of these test scores, first press
STATon your TI calculator and choose Edit on the EDIT menu. Enter all of the scores into L1, and then press
2NDMODE
to go back to the main screen.
Next, press
STAT, go to the CALC menu, and choose 1-Var Stats.
After pressing
ENTERto choose 1-Var Stats and then pressing
ENTERagain, you should see the following screen: