Stats M. 3

Question 1

probability is a number between…

Answer 1

0 and 1

Question 2

probability can be expressed as…

Answer 2

fraction, decimal, or percentage

Question 3

subjective probability

Answer 3

based on personal opinion

ex. there is a 30% chance that I will attend the next Miami hockey game

Question 4

theoretical probability

Answer 4

based on formulas

ex. the probability of getting head when flipping a fair coin is 50% since there are two possible outcomes and both are equally likely

Question 5

experimental probability

Answer 5

based on the results of a random experiment

ex. flip a coin 10 times and use the proportion of times you obtain heads to estimate the probability of getting heads

Question 6

Law of large numbers

Answer 6

if we repeat an experiment a large # of times the results that we see experimentally should be closer and closer to what we would expect to see theoretically

Question 7

sample space

Answer 7

collection of all possible outcomes
-tree diagrams
-venn diagrams

Question 8

event

Answer 8

a subset of the sample space, a collection outcomes
-a single outcome (getting head on a coin flip)
-several outcomes (rolling an even number on a die)
-the entire sample space
-no outcome at all

Question 9

complement

Answer 9

the subset of all outcomes within the sample space that are NOT in the event A of interest

Question 10

intersection

Answer 10

(A and B) The event containing all of the elements that are common to both A and B

Question 11

union

Answer 11

(A or B) The event containing all of the elements that belong to either A only, B only, or both A and B

Question 12

mutually exclusive

Answer 12

events that have no outcomes in common
-cannot happen at the same time

Question 13

Complements P(A^c)=

Answer 13

1-P(A)

Question 14

Unions P(A or B)=

Answer 14

P(A)+P(B)-P(A and B)

Question 15

Correct postive

Answer 15

test result indicates that the condition is present, and it is

Question 16

false positive

Answer 16

test result indicates that the condition is present, but it is not

Question 17

fasle negative

Answer 17

test result indicates that the condition is not present, but it is

Question 18

correct negative

Answer 18

test result indicates that the condition is not present, and its not

Question 19

sensitivity

Answer 19

the probability that the test will give a positive result, given that the condition tested for is present
P(Positive result|condition is present)

Question 20

specificity

Answer 20

the probability that the test will give a negative result, given that the condition tested for is not present
P(Negative result|condition is not present)