If variables with a multivariate normal distribution have covariances that equal zero, then
B) the variables are independent.
C) you should use the distribution to calculate probabilities.
D) the marginal distribution of each of the variables is no longer normal.
Answer: B
Probability
- The sample average is a random variable and
- 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 expected value of a discrete random variable
- 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