3. Performance scores are collected for 10 individuals and those scores are 17, 12, 20, 11, 8, 18, 17, 9, 12, and 15. Find ΣΕ1Xī where Xi represents the 10 scores.
3. Performance scores are collected for 10 individuals and those scores are 17, 12, 20, 11, 8, 18, 17, 9, 12, and 15. Find ΣΕ1Xī where Xi represents the 10 scores.
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