Assume that 15% of people are left-handed. If 6people are
selected at random, find the probability of each outcome described
below.
a) Find the probability that the first lefty is the sixth
person chosen.
(Round to four decimal places as needed.)
b) Find the probability that there are some lefties among the 6
people.
(Round to four decimal places as needed.)
c) Find the probability that the first lefty is the fourth or
fifth person.
(Round to four decimal places...
Approximately 13% of the population are left-handed.
If three people are randomly selected, what is the probability
that all are left- handed? (round to 4
decimal places)
If three people are randomly selected, what is the probability
that at least 1 person is not left handed?
(round to 4 decimal places)
Notice that these two events are complementary (the
probabilities do add up to 1).
The probability that a person is left-handed is 17%. You
randomly select three people. What is the probability that: a) all
three are left handed b) none of them are left handed c) at least
one of them is left-handed
. Approximately 10% of all people are left-handed, then the rest
of people are right-handed. Consider a group of 15 people, answer
the following question: (You cannot use the binomial table for this
problem) (a) State the random variable ?. (2 points) (b) Explain
why this is a binomial experiment. There should be 4 conditions to
check. (State the probability of left-handed people ?, the possible
outcomes, and the number of trials ? in the conditions.) (4 points)
(c) Find...
Given: "The proportion of left-handed people is equal to
10%"
a) Provide a Conclusion that would be a Type I error
b) Provide a Conclusion that would be a Type II error
1. It is known that 15.2% of the population is left-handed.
Select a sample of 60 individuals? a) Describe the sampling
distribution of the sample proportion. Be sure to calculate the
mean (expected value) and the standard deviation of the sample
proportion. b) What is the probability that at least 20% of
individuals in this sample will be left-handed? c) What is the
probability that at most 35% of individuals in this sample will be
left-handed?
1. Assume that 13% of people are left-handed. Suppose 8 people
are selected at random. Answer each question about right-handers
below.
a) Find the mean and standard deviation of the number of
right-handers in the group.
b) What's the probability that they're not all
right-handed?
c) What's the probability that there are no more than 5
righties?
d) What's the probability that the majority is
right-handed?
2. A certain tennis player makes a successful first serve 64%
of the time....
1. Assume that 7% of people are left-handed. If we select 5
people at random, find the probability of each outcome described
below, rounded to four decimal places: a. There are some lefties (
≥ 1) among the 5 people. b. There are exactly 3 lefties in the
group. c. There are at least 4 lefties in the group. d. There are
no more than 2 lefties in the group. e. How many lefties do you
expect? f. With what...
Explain how genes and hormones influence behavior. How do jeans and
hormones influence someone being left-handed over right handed? How
do you jeans and hormones influence sexual orientation (someone
being homosexual vs. heterosexual)? What does the research say? How
are these theory similar? What are the ethical issues?
Do left-handed people live shorter lives than right-handed
people? A study of this question examined a sample of 949 death
records and contacted next of kin to determine handedness. Note
that there are many possible definitions of "left-handed." The
researchers examined the effects of different definitions on the
results of their analysis and found that their conclusions were not
sensitive to the exact definition used. For the results presented
here, people were defined to be right-handed if they wrote, drew,...