The ages of students at a university are normally distributed with a mean of 21. What percentage of the student body is at most 21 years old? A. 95% B. 50% C. None D. 21% E. It could be any value, depending on the magnitude of the standard deviation
The ages of students at a university are normally distributed with a mean of 21. What percentage of the student body is at most 21 years old? A. 95% B. 50% C. None D. 21% E. It could be any value, depending on the magnitude of the standard deviation
The ages of students at a university are normally distributed with a mean of 21. What percentage of the student body is at most 21 years old? A. 95% B. 50% C. None D. 21% E. It could be any value, depending on the magnitude of the standard deviation
20. The ages of students at a university are normally distributed with a mean of 21. What percentage of the student body is at most 21 years old?
A. 95%
B. 50%
C. None
D. 21%
E. It could be any value, depending on the magnitude of the standard deviation
Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.
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