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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Averages versus individuals. Scores on the ACT college entrance examination vary Normally with mean μ = 18 and standard deviation σ = 6. The range of reported scores is 1 to 36.
(a) What range contains the middle 95% of all individual scores?
(b) If the ACT scores of 25 randomly selected students are averaged, what range contains the middle 95% of the averages
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