And Probabilities

If two coins are tossed, which is NOT a possible value of the random variable for the number of heads?

• 0

• 1

• 2

• 3

You decided to conduct a survey of families with two children. You are interested in counting the number of boys (out of 2 children) in each family. Is this a random variable? If it is, what are the possible values?

• Yes, it is a random variable and its value can be 1 or 2.

• Yes, it is a random variable and its value can be 0, 1 or 2.

• Yes, it is a random variable and its value can be 2 or 4.

• No, it is not a random variable since it is not random.

Which of the following cannot be the value of probability of the random variable?

• 1.01

• 0

• 1/4

• 1/2

If P(X) = X /6 , what are the possible values of X for it to be a probability distribution?

• 0,2,3

• 1,2,3

• 2,3,4

• 1,1,2

What is the probability that someone who likes Toyotas is female?

• .525

• .4627

• .6774

• .3143

One thousand tickets are sold for ₱10.00 each. One ticket will win ₱2,000.00, two tickets will win ₱1,000.00 each and four tickets will win ₱500.00 each. What is the probability of winning

any amount in the purchase of one ticket?

The total area under the standard normal curve is _________.

• -1

• 0

• 0.5

• 1

What is the shape of a Normal Probability Distributions?

• bar

• bell

• circle

• line

Which of the following rule states that almost all data fall within the 1, 2 and 3 of standard deviation of mean when the population is normally distributed?

• empirical rule

• Pascal’s triangle rule

• Lottery rule

• Love rule

The commuting time for a student to travel from home to a college campus is normally distributed with a mean of 30 minutes and a standard deviation of 5 minutes. If the student leaves home at 8:25 am, what is the probability that the student will arrive at the college campus later than 9 am?

• 0.16

• 0.32

• 0.50

• 0.84

• 1.00