z Scores. In Exercises 58, express all z scores with two decimal places.Obama's Net Worth As of this writing, Barack Obama is President of the United States and he has a net worth of $3,670,505. The 17 members ofthe Executive Branch have a mean net worth of $4,939,455 with a standard deviation of $7,775,948 (based on data from opensecrets.org).a. What is the difference between President Obama's net worth and the mean net worth of all members of the Executive Branch?b. How many standard deviations is that (the difference found in part (a))?c. Convert President Obama's net worth to a z score.d. If we consider usual amounts of net worth to be those that convert to z scores between 2 and 2, is President Obama's net worth usual orunusual?

STAT 2004 WEEK 14 REVIEW: T-test Use a T-test when sigma is unknown. Use cutoffs to test, not p-values. HYPOTHESIS TESTING RATIONALE Make an assumption. Is what you observed likely or unlikely Compare what you observe to what you expect. CHI-SQUARE TEST How different is what we observed...