The random variable, “number of people who arrive at a store during a 15-minute interval,” is an example of __________. not a random variable a continuous random variable an experimental random variable a discrete random variable

The weight of persons in a state is a ___________ a)     Irregular random variable b)     Continuous random variable c)     Discrete random variable d)     Not a random variable

Assume that 12 jurors are selected from a population in which 50​% of the people are​ Mexican-Americans. The random variable x is the number of​ Mexican-Americans on the jury.   x 0 1 2 3 4 5 6 7 8 9 10 11 12   ​P(x) 0.0000.000 0.0030 0.0160 0.0540 0.1210 0.1930 0.2260 0.1930 0.1210 0.0540 0.0160 0.0030 0.0000   A. Find the probability of exactly 2 Mexican-Americans among 12 jurors. P(2​)equals=     b. Find the probability of 2 or fewer​ Mexican-Americans among 12 jurors.   c. Does 2 Mexican-Americans among 12 jurors suggest that the selection process discriminates against​ Mexican-Americans? Why or why​ not?

Do bonds reduce the overall risk of an investment portfolio? Let x be a random variable representing annual percent return for Vanguard Total Stock Index (all stocks). Let y be a random variable representing annual return for Vanguard Balanced Index (60% stock and 40% bond). For the past several years, we have the following data. x: 15 0 24 28 15 17 36 −9 −16 −16 y: 21 −8 27 10 10 27 22 −2 −3 −1