In Exercises, find (a) The mean of the distribution, (b) The standard deviation of the distribution, and
Question:
In Exercises, find
(a) The mean of the distribution,
(b) The standard deviation of the distribution, and
(c) The probability that the random variable is between the mean and 1 standard deviation above the mean.
The length of time (in days) required to learn a certain task is a random variable t with probability density function defined by
Transcribed Image Text:
f(t) -1/3 e 3 20 for t in [0, ∞).
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