The sample average is a random variable and
B) has a probability distribution called its sampling distribution.
C) has a probability distribution called the standard normal distribution.
D) has a probability distribution that is the same as for the Y_1,... Y_n i.i.d. variables.
Answer: B
Probability
- 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 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