4.1 prob and stat

If the probability that it will rain tomorrow is 0.36, what is the probability that it will not rain tomorrow?

0.64

If a red suit is drawn from an ordinary deck of cards, what is the probability that the card is a diamond?

1/2

If two dice are rolled one time, find the probability of getting a sum less than 5

1/6

A probability experiment has two steps. There are two possible results for the first step, call them "A" and "B". If the result for the first step was "A", then there would be 5 possible results for the second step. If the result for the first step was "B", then there would be 14 possible results for the second step. How many possible outcomes are there for this experiment?

19

In a recent study, the following responses were obtained to the question, "Do you favor recycling in your neighborhood?" Yes No No Opinion Males 25 15 10 Females 30 10 10 If a response is picked at random, what is the probability that it came from a male or that it indicated no opinion regarding recycling?

3/5

Box A contains the numbers 1, 2, 3, and 4. Box B contains the numbers 5, 6, 7, and 8. A number is first drawn from Box A and then another number from Box B. Using the figure below, how many outcomes are possible if both numbers are even?

4

If two dice are rolled one time, find the probability of getting a sum of 6.

5/36

The staff at a small company includes: 4 secretaries, 20 technicians, 4 engineers, 2 executives, and 50 factory workers. If a person is selected at random, what is the probability that he or she is a factory worker?

5/8

At Wassamatta University, 49.9% of the student body are males. Choose one student at random. What is the probability that the student is female?

50.1%

How many possible outcomes would there be if three coins were tossed once?

8

A child gets 20 heads out of 30 tosses of a coin. If he declared the chance of getting a head with that coin were 2/3, that would be an example of _ probability.

Empirical probability

If a die were rolled, the event of getting an even number would be called a simple event.

False

If one tosses a coin enough times, the number of heads and tails will tend to "even out." This is an example of the law of _.

Large numbers

What is the set of all possible outcomes of a probability experiment?

The sample space

A compound event consists of two or more outcomes or simple events.

True

A jar contains four white marbles, five red marbles, and six black marbles. If a marble were selected at random, the probability that it is white or black would be

True

Classical probability was the first type of probability studied formally by mathematicians of the 17th and 18th centuries.

True

If there are 17 equally likely events, then the probability of the first one occuring is 1/17.

True

Two events are mutually exclusive if they cannot both occur.

True

What type of probability uses a knowledge of sample spaces as opposed to experiments to determine the numerical probability that an event will occur?

classical probability

Tree diagrams are useful for

finding all possible outcomes in a probability experiment involving several steps.

If a sportscaster makes an educated guess as to how well a team will do this season, he is using what type of probability?

subjective probability

The statement, "The probability that a certain sports team will win it's next game is about 60%," is an example of

subjective probability