If a normal distribution of scores has a mean of 40 and a standard deviation of 5, what range of values would contain 99.74% of the scores? A) 14 to 80 B) 25 to 55 C) 35 to 55 D) 30 to 64
Added by Jessica H.
Step 1
- To find the upper limit of the range, we add 3 standard deviations to the mean: 40 + 3(5) = 40 + 15 = 55. Show more…
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