Statistics Chapter 5 Review

If you draw out a red marble, keep it, then draw out a blue marble, is it independent or dependent probability?

• Independent

• Dependent

Valentina has 3 raffle tickets. One hundred tickets were sold. Her name was not drawn for the first prize. What is the probability that her name will be drawn for the second prize? (leave answer in fraction form in lowest terms, and remember that the first ticket was already drawn out and was not replaced)

• 1/3

• 1/33

• 3/100

• 2/99

Is this probability assignment possible?

• YES! Because all probabilities add up to 1!

• NO! Because it doesn't have enough probabilities.

• NO! Because the probabilities do not add up to 1.

• NO! Because one cannot win money like this.

If Mrs. Mack polls the class and asks, "What is your favorite pizza topping?" Suppose that the responses include: 10% cheese; 30% pepperoni; 25% sausage; 5% ham. What is the probability that a student responded "pepperoni" or "sausage"?

• 30%

• 25%

• 55%

• This cannot be calculated.

How likely are you to NOT roll a 1 on a regular die? (Complement)

If the probability of A given B is equal to the probability of A given not B, then...

• ... A and B are independent.

• ... A and B are not independent.

• ... A and B are mutually exclusive.

• ... ??? There's not enough information to draw a conclusion.

What is the probability the dessert has peanut butter in it?

• 0.84

• 0.58

• 0.22

• 0.59

What is the probability that the dessert doesn't have peanut butter in it?

• 16

• 0.41

• 0.38

• 0.78

What is the chance that the dessert is brownies and has peanut butter in it?

• 0.94

• 0.58

• 0.99

• 0.95