ECON test 2
A coin is tossed 9 times. What is the probability of getting all tails?
(1/2)^9=0.0020
Write out the sample space for the given experiment. Use the letter H to indicate heads and T for tails. 2
(TT,TH,HT,HH)
What is the probability of rolling a sum of 2 on a standard pair of six-sided dice?
1/36=0.028
A coordinator will select 8 songs from a list of 14 songs to compose an event's musical entertainment lineup. How many different lineups are possible?
14P8= 121080960
Ask your friend to pick a day in the second half of April when he will be free to help you, and write down that day's number. What is the minimum value of the random variable X?
16
How many ways can Carlos choose 2 pizza toppings from a menu of 16 toppings if each topping chosen once?
16C2= 120
User passwords for a certain computer network consist of 2 letters followed by 4 numbers. How many different passwords are possible?
26^2*10^4=6760000
Out of 275 books in a bookcase, 134 are fictional.
275-134= 141
Decide if the following probability is classical, relative frequency, or subjective. Selecting a 22 from a standard deck of cards.
CLASSICAL PROBABILITY
You believe you have a 1/6 chance of rolling a 6 on a six-sided die.
CLASSICAL PROBABILITY
Decide if the following probability is classical, relative frequency, or subjective. You calculate that the probability of randomly choosing a student who is right-handed is about 19%.
RELATIVE FREQ. PROBABILITY
Decide if the following probability is classical, relative frequency, or subjective. You guess that there is a 65% chance that you will be assigned homework in your French class on Tuesday.
SUBJECTIVE PROBABILITY
A phone usage study records the time spent on the phone each day for 189189 randomly selected individuals.
continuous
The amount of time six randomly selected volleyball players play during a game.
continuous
The highway miles per gallon for an automobile.
continuous
IQ scores of students at the local college.
discrete
A subset of outcomes of the sample space is called a(n)
event
Robert makes it to work on time. Kathy wins the state lottery.
independent
Choosing a heart or a black card out of a standard deck of cards.
mutually exclusive
Choosing a red card or a black card out of a standard deck of cards.
mutually exclusive
Choosing a student who is a sophomore in college or a chemistry major from a nearby university to participate in a research study.
not mutually exclusive
Each individual result of a probability experiment is called a(n)
outcome
The set of all possible outcomes for a given probability experiment is called the
sample space
least amount of risk
the value that is higher
