PROB & STATS 4.04 QUIZ

What's the expected value of x? X: 0 1 2 3 P: 1/3 1/3 1/6 1/6

1 1/6

The Roswell Aliens of the American Soccer League had the following results one year. What's the expected value of the number of goals the Roswell Aliens will score in a match the following year? X: 0 1 2 3 P: 1/3 1/5 3/10 1/6

1 3/10

What's the expected value of x? X: 1998 1999 2000 2001 2002 P: 0.42 0.2 0.15 0.1 0.13

1999.32

What's the expected value of x? X: 0 1 2 3 4 5 P: 0.1 0.1 0.1 0.1 0.5

3.5

A clothing store has a section of jeans on sale. There's a 30% chance of picking a pair with a 30 in. inseam; 25% chance of picking one with a 32 in. inseam; 10% chance picking 34 in. inseam; 10% chance picking 36 in. inseam; 10% picking 38 in. inseam; and 15% chance picking 40 in. inseam. What's the expected value of the inseam length of the jeans?

33.8