Which two events are most likely to be independent?

doing the Statistics homework; getting an A on the test

What is a random Variable ?

A numerical value assigned to a group or subset

Which of these has a geometric model?

number of people survey until someone who owns an iPod

Asthe sample size increases, the

standarderror of the mean decreases

Which of these is a Geometric model?

the number of people surveyed until someone has took stat.

A simple random sample from aninfinite population is a sample selected such that

eachelement is selected independently from same population

Which of those choices listed in problem 7 is most likely to have a binomial model?

The number of hits a baseball player gets in 6 times at bat.

Which of these has a binomial model?

he number of people in a class that has taken stat.

Which of the following random variables is considered continuous?

the time it takes a randomly chosen woman to run 100 meters.

numerical characteristics of apopulation

which two events are most likely to be independent?

Having an drivers license and having blue eyes.

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Chapter 7 review

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Answers

1
Which two events are most likely to be independent?
) registering to vote; being left-handed
being a senior; going to homeroom
having 3 inches of snow in the morning; being on timel
doing the Statistics homework; getting an A on the test
2
Conveniencesampling is an example of..
clustersampling
nonprobabilisticsampling
probabilisticsampling
stratifiedsampling
3
What is a random Variable ?
A numerical variable
A numerical value assigned to a group or subset
A number tooken from and population.
a number that is randomly selectes for and srs.
4
Since the sample size is alwayssmaller than the size of the population, the sample mean
mustbe larger than the population mean
mustalways be smaller than the population mean
mustbe equal to the population mea
All of the Above
5
Which of these has a geometric model?
) The colors of the cars in the grocery store parking lot
number of people survey until someone who owns an iPod
number of hits a baseball player gets in 6 times at bat
The number of hits a baseball player gets in 6 times at bat.
6
Asthe sample size increases, the
standarddeviation of the population decreases
standarderror of the mean decreases
populationmean increases
standarderror of the mean increases
7
Which of these is a Geometric model?
the number of people surveyed until someone has took stat.
the number of people in class that has taken stat.
the nuber of aces in a 5 card poker hand.
the number of sodas a students drinks in a day.
8
The closer the sample mean is tothe population mean,
thesampling error equals 1
thelarger the sampling error
Noneof these alternatives is correct.
thesmaller the sampling error
9
Which of the following is anexample of nonprobabilistic sampling?
simplerandom sampling
Stratifies simple random sampling
Judgment Sampling
clustersampling
10
A simple random sample from aninfinite population is a sample selected such that
eachelement is selected independently from same population
element has a probability of at least 0.5 of being selected
eachelement has a 0.5 probability of being selected
theprobability of being selected changes
11
Which of those choices listed in problem 7 is most likely to have a binomial model?
The number of hits a baseball player gets in 6 times at bat.
The colors of the cars in the grocery store parking lot
The number of black cards in a 10-card hand.
The colors of the cars in the grocery store parking lo
12
Which of these has a binomial model?
the number of people surveyed until someone has taken stat.
the number of aces in a five card poker hand.
he number of people in a class that has taken stat.
the number of sodas a students drinks per day.
13
Which of the following random variables is considered continuous?
the time it takes a randomly chosen woman to run 100 meters.
The number of borthers a randomly chosen person has.
the number of cars owned by a randomly chosen Man.
None of the above
14
Parameters are..
numerical characteristics ofeither a sample or a population
the averages taken from a sample
numerical characteristics of asample
numerical characteristics of apopulation
15
which two events are most likely to be independent?
getting an Ain math and getting an A in physics.
Having a flat tire and being late for school
Having an drivers license and having blue eyes.
Being a Senior and leaving campus for lunch.

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