Question 819958: The mean length of Beethoven’s nine symphonies is 37 minutes; the standard deviation is 12 minutes..
All of the following data values lie within how many standard deviations of the mean?
27 min, 30 min, 47 min, 35 min, 30 min, 40 min, 35 min, 22 min, 65 min
a.1 standard deviation
b.2 standard deviations
c.3 standard deviations
d.4 standard deviations
Answer by Sophietenen(1)   (Show Source):
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