5.1 basics of probability

Question 1

probability experiment

Answer 1

one in which we don’t know what any individual outcome will be, but we do know how a long series of repetitions will come out

Question 2

probability of an event

Answer 2

is the proportion of time that the event occurs in the long run

Question 3

law of large numbers

Answer 3

a probability experiment is repeated over and over until that proportion of times that a given event occurs will approach its probability

Question 4

sample space

Answer 4

collection of all the possible outcomes of a probability experiment (ex: toss of a coin:heads and tails; roll of a die: 1,2,3,4,5,6)

Question 5

an event

Answer 5

the collection of outcomes of a sample space (EX: rolling an odd number: 1,3,5, from the sample space 1,2,3,4,5,6)

Question 6

probability model

Answer 6

donated by P, helps specify a probability of each event

Question 7

probability rules

Answer 7

the probability of an event is always between 0 and 1. 1 meaning certain to occur and 0 meaning cannot occur. anything below .5 is unusual

Question 8

probability with equally likely outcomes

Answer 8

P(A)=k/n, A meaning event, =number of outcomes in A/number of outcomes in the sample space

Question 9

dont reduce fractions

Answer 9

in ALEKS they like you to keep the ratio in nonreduced terms