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The mean score of a competency test is 82, with a standard deviation of 2. Between what two values d...
4 months ago
Q:
The mean score of a competency test is 82, with a standard deviation of 2. Between what two values do about 99.7% of the values lie?
Accepted Solution
A:
99.7% encompasses about 3 standard deviations either side of the mean.
82 Β±3*2 = (76, 88)
About 99.7% of the values lie between 76 and 88.