Question

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Name: 1. The cumulative probability distribution shows the probability: (a) that a random variable is less than or equal to a particular value. (b) of two or more events occurring at once. (c) of all possible events occurring. (d) that a random variable takes on a particular value given that another event has happened 2. To standardize a variable you (a) subtract its mean and divide by its standard deviation. (b) integrate the area below two points under the normal distribution (c) add and subtract 1.96 times the standard deviation to the variable. (d) divide it by its standard deviation, as long as its mean is 1. 3. The expected value of a discrete random variable: (a) is the outcome that is most likely to occur. (b) can be found by determining the 50% value in the de (e) equals the population median (d) is computed as a weighted average of the possible outcome of that random t the probabilities of that outcome e the

Answer 1

1) A. Cumulative probability distribution sums up the individual probability distribution. It includes the probability distribution of an event a or any value before a.

2)A. Z=(X-Mean)/Standard deviation

3)D. Expected value is the weighted average where weights are equal to the  probability assigned to the outcome