The value of interval x ± S include _______________?
Correct answer: C. 68.27%
- A. 49.45%
- B. 95.45%
- C. 68.27%
- D. 99.73%
Explanation
For a normal distribution, the interval from the mean minus one standard deviation to the mean plus one standard deviation contains about 68.27% of observations. The 95.45% and 99.73% figures correspond to two and three standard deviations.
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