The standard deviation of a normal probability distribution (a) is always equal

Question

The standard deviation of a normal probability distribution (a) is always equal to zero. (b) is always equal to 1.0. (c) can be any value as long as it is positive. (d) can be any value (positive, negative, or zero) This distribution describes a random variable that is as likely to occur in one segment of a given size within a specified range as another. (a) Binomial (b) Poisson (c) Normal d) Uniform (e) Exponential (f) Gamma (g) Weibull (h) Lognormal The mean of a standard normal probability distribution (a) is always equal to zero. (b) is always equal to 1.0. (c) can be any value as long as it is positive. (d) can be any value (positive, negative, or zero) For a continuous random variable X, the probability density function f(x) represents (a) probability at a given value of X (b) area under the curve at x (c) height of the function at x (d) number of standard deviations from the mean of the distribution (e) none of the above

Explanation / Answer

1)

b) is always equal to 1

2)

d) Uniform

3)

a) is always equal to zero

4)

a) probability at a given value of X

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