A random sample of size n 5 is taken from a lognormal distribution with parameters u = 0.7 and o 1.09. Find the variance of the sample mean, X. (Answer as a decimal.number, and round to 3 decimal...

Only answers for both

Extracted text: A random sample of size n 5 is taken from a lognormal distribution with parameters u = 0.7 and o 1.09. Find the variance of the sample mean, X. (Answer as a decimal.number, and round to 3 decimal places).


Extracted text: Another food truck serves large burritos. The owner finds that 22% of her customers don't purchase any burritos, 51% of her customers purchase 1 burrito, and the rest of her customers purchase 2 burritos. Let X1, X2 be the number of burritos purchased by each of a random sample of two customers. Consider the sample mean X. Find E(X). (Answer as a decimal number, and round to 3 decimal places, if necessary). (You should tabulate all possible pairs x1, x2 of values of X1, X2, along with the joint probabilities p(x1, 12), and their mean x. Also, you should find the sampling distribution of X.)