Question: a. Let the probability distribution of a random variable () be the normal distribution as its expected value 12.1. Let the probability distribution of another

a. Let the probability distribution of a random variable () be the normal distribution as its expected value 12.1. Let the probability distribution of another random variable () be the distribution (9.6, 14.6). Do the random variables and have the same expectation value? b. Continued in a. It is known that ( 13.9) = 0.975. Determine the standard deviation of the random variable

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