Statistics - TEST 2

Unlock all answers in this set

question
The sample space refers to :
the set of all possible experimental outcomes
question
From a group of six people, two individuals are to be selected at random. How many possible selections are there?
15
question
When the results of experimentation or historical data are used to assign probability values, the method used to assign probabilities is referred to as the
relative frequency method
question
A method of assigning probabilities based upon judgment is referred to as the
subjective method
question
A graphical device used for enumerating sample points in a multiple-step experiment is a
tree diagram
question
The intersection of two mutually exclusive events
must always equal 0
question
Two events are mutually exclusive
if they have no sample points in common
question
The range of probability is
zero to one
question
The set of all possible outcomes of an experiment is
the sample size
question
Assuming that each of the 52 cards in an ordinary deck has a probability of 1/52 of being drawn, what is the probability of drawing a black ace
2/52
question
If P(A)=0.4, P(B/ A)=0.35, P(AUB)=0.69, then P(B)=
0.43
question
Assume your favorite football team has 2 games left to finish the season. The outcome of each game can be win, lose or tie. The number of possible outcomes is
9
question
The symbol Cshows the
intersection of two events
question
The union of events A and B is the event containing
all sample points belonging to A or B or both
question
If A and B are independent events with P(A)=0.4 and P(B) = 0.6, then P(AnB)=
0.24
question
If A and B are independent events with P (A)= 0.2 and P (B) =0.6, then P(AUB) =
0.68
question
A method of assigning probabilities based on historical data is called the
relative frequency method
question
If A and B are independent events with P(A) =0.4 and P(B) =0.25, then P(AUB)=
0.55
question
If x and y are mutally exclusive events with P(X) =0.295, P (Y)=0.32, then P(X/Y)=
0.000
question
If P(A) =0.48, P(AUB) =0.82, and P(B) =0.54, then P(AnB)=
0.200
question
A numerical description of the outcome of an experiment is called a
random variable
question
The binomial probability distribution is used with