reading quiz 8

Question 1

Random sampling is important in statistics because it ensures the following two characteristics:

Answer 1

• each possible sample of a given size has an equal chance of being selected.
• all members of the population have an equal chance of being selected into the sample.

Question 2

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You shuffle a deck of cards and select one at random. You return it to the deck and repeat the process. This process is an example of ___________________________.

Answer 2

sampling with replacement

Question 3

A priori means ______________________.

Answer 3

deduced from reason alone

Question 4

When two events cannot occur together (i.e., the occurrence of one precludes the occurrence of the other), they are said to be _________________.

Answer 4

mutually exclusive

Question 4

The a priori probability of getting a 1,2, or 3, on one roll of a single, fair die is:

Answer 4

.5

Question 5

The set of possible outcomes for the roll of a single die is [1, 2, 3, 4, 5, 6]. Because this set includes all possible outcomes, it is said to be ___________________.

Answer 5

exhaustive

Question 6

Two events are _____________if the occurrence of one has no effect on the probability of occurrence of the other.

Answer 6

independent

Question 7

You have a single coin to flip. Let P equal the probability of a head and Q equal the probability of a tail. If P is not equal to Q, then the coin is said to be ____________.

Answer 7

biased

Question 8

What is the name of the following rule?

p(A and B) = p(A)p(B|A)

Answer 8

Multiplication rule with dependent events

Question 9

You are asked to calculate the probability of rolling a 5 on a fair die and a 6 on another. The word “and” in this problem suggests that you should calculate the two probabilities independently and then ______________________.

Answer 9

multiply them