{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Assignment 4.3

15 give everyone in the salary example a 10 raise

Info iconThis preview shows pages 3–4. Sign up to view the full content.

View Full Document Right Arrow Icon
15. Give everyone in the salary example a 10% raise. What’s the new average salary? Everyone working at Bob’s diner makes $8/hour. 16. What is the expected salary per hour? 17. What is the variance of the salaries at Bob’s diner? Let X = price of stocks in Bob’s portfolio; let Y = price of stocks in Sue’s portfolio. Mean of X = $20, SD = $5; Mean of Y = $30, SD = $6 18. Suppose all the stocks in Bob’s portfolio double in price. a. What happens to the mean of Bob’s stocks? b. What happens to the variance? 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
19. Suppose all of Sue’s stocks each increase $10.00 in price. a-b. What happens to the mean and variance of her stock prices? 20. Assume Bob and Sue’s stocks are independent. a. What is the mean and standard deviation of their combined stock prices? b. What is the mean and standard deviation of the difference in their stock prices? 21. Assume Bob and Sue’s stocks have correlation 0.4. a. What is the mean and standard deviation of their combined stock prices? b. What is the mean and standard deviation of the difference in their stock prices? \ 4
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page3 / 4

15 Give everyone in the salary example a 10 raise Whats the...

This preview shows document pages 3 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online