Let X and Y represent the number of Dell and HP laptop computers, respectively, sold per month

Question:

Let X and Y represent the number of Dell and HP laptop computers, respectively, sold per month from online sites. The file S04_28.xlsx contains the probabilities of various combinations of monthly sales volumes of these competitors.
a. Find the marginal distributions of X and Y. Interpret your findings.
b. Calculate the expected monthly laptop computer sales volumes for Dell and HP at these sites.
c. Calculate the standard deviations of the monthly laptop computer sales volumes for Dell and HP at these sites.
d. Find and interpret the conditional of X given Y.
e. Find and interpret the conditional of Y given X.
f. Find and interpret the correlation between X and Y. Are these random variables independent (or nearly so)?

Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...