VOCABULARY
any collection of results or outcomes of a procedure
event
Find the probability when a single six sided die is rolled the out come is 5
round 4 digits
1/6=0.1667
what formula is this? sample or population
Z Score = (x − x̅ )/S
Sample
What is the probability that a child will be a girl?
1/2= 0.5
P denotes ______
probability
an outcome or an event that cannot be further broken down into simpler components
simple event
Find the probability when a coin is tossed, and the result is heads
1/2=0.5
what formula is this? sample or population
Z Score = (x − u)/σ
population
If a family has two children and one of them is a boy, then the probability of the other being a girl is
2/3= 0.6667
A, B, and C denotes ________
specific events
a procedure that consists of all possible simple events
sample space
Find the probability that a six sided die is rolled, and the outcome is 7
0
s/n
Classical Approach to probability
Find the probability that a commercial airliner will crash on any given flight.
In a recent year , there were about 39 million commercial airline flights and 16 of the crashed.
p( airline crash)= number of airline crashes/ total number of airline flights
16/ 39,000,000 =0.000000410
P(A) denotes
probability of event A occurring
event A denoted by Ā, consists of all outcomes in which event A does not occur
complement
If there are 11 marbles in the bag, 3 are green, 2 are blue, and 6 are yellow.
what is the probability that you would pull a green marble out of the bag.
3/11
f/n
Relative Frequency approximation of probability
In a Pew research Center Survey, randomly selected adults were asked if they have seen or have been in the presence of a ghost. 366 of the respondents answered "yes" ans 1637 of the respondents answered "NO". Based on these results find the probability that a randomly selected adult says that they have seen or been in the presence of a ghost
p( response of yes)= 366/2003= 0.183
Z denotes
a number of standard deviations where a value falls above or below the mean
combining 2 or more simple events
Compound events
If there are 11 marbles in the bag, 3 are green, 2 are blue, and 6 are yellow.
what is the probability that you would pull a yellow marble out of the bag.
6/11
Daily Double
Who is the best Elementary Statistic Teacher?
Dr. Jack
In a Pew research Center Survey of 2002 randomly selected adults, 1782 of those respondents said that they use the internet. Find the probability that a randomly selected adult does not use the internet
2002- 1782= 220
p( not using the internet)= 220/2002=0.110
The symbol N represents
the total number of individuals or observations in the sample