The expected value of a discrete random variable
B) can be found by determining the 50% value in the c.d.f.
C) equals the population median.
D) is computed as a weighted average of the possible outcome of that random variable, where
the weights are the probabilities of that outcome.
Answer: D
Probability
- The sample average is a random variable and
- If variables with a multivariate normal distribution have covariances that equal zero, then
- Assume that Y is normally distributed N(miu, sigma) . Moving from the mean (miu) 1.96 standard deviations to the left and 1.96 standard deviations to the right, then the area under the normal p.d.f. is
- To standardize a variable you
- The correlation between X and Y
- For a normal distribution, the skewness and kurtosis measures are as follows:
- The cumulative probability distribution shows the probability
- The probability of an event A or B (Pr(A or B)) to occur equals
- The probability of an outcome