Transcript Discrete Review Game

Discrete Review
Game
About 25% of those called for
jury duty will find an excuse
(work, poor health, travel, etc.)
to avoid jury duty. If 12 people
are called, what is the probability
that less than 6 will not be
available to serve?
P(X < 6) =Binomial
.9456
A survey of families in Statsylvania
found that 12% of the households
had no motor vehicles, 36% had
one vehicle, 33% had two vehicles,
18% had three vehicles, and 1%
had four vehicles. Find the mean
and standard deviation for this
distribution.
m = 1.6 & sGeneric
= .95
The EPA reports that 81% of
Americans do not recycle
garbage. If 6 Americans are
randomly selected, find the
probability that at least two of
them recycle.
Binomial
P(X > 2) = .3201
One airline has found that 9% of
the people who make
reservations do not show. If the
airline has accepted 220
reservations for a plane that has
210 seats, what is the probability
that there are enough seats for
all the passengers who show up?
Binomial
P(X < 210) = .9959
An experiment consists of tossing
a coin 10 times. What is the
probability that the first head will
occur on the fourth toss?
Geometric
P(X = 4) = .0625
According to the US Census Bureau,
about 22% of American children under
the age of 6 live in households with
incomes below the official poverty level.
A random sample of 400 children under
the age of 6 is taken. What are the
mean and standard deviation of children
in the sample who come from households
with incomes below the official poverty
level?
Binomial
m = 88 & s = 8.28
The probability that a student is
tardy to Statistics class is 0.012.
(They just can’t wait to come to
class!) How many students
should Mrs. Goins expect to see
before the first one is tardy?
m = 83.33
Geometric
Official records in a particular city
show that the average number of
days schools close in a school year
due to flooding is 1.5 days. What
is the probability that there will be
6 days schools are closed due to
flooding in the next three years?
P(X = 6) =Poisson
.1281