Answered

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probability that an individual has​ 20-20 vision is 0.16. In a class of 90 ​students, what is the mean and standard deviation of the number with​ 20-20 vision in the​ class? Round to the nearest thousandth.
A.
The mean is 90. The standard deviation is 1.1.
B.
The mean is 14.4. The standard deviation is 3.478.
C.
The mean is 90. The standard deviation is 1.2.
D.
The mean is 1.44

Sagot :

B the mean is 14.4 the standard deviation is 3.478
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