Choose the best answer.

the wording of questions has a big effect on poll results.

a sample that attempts to include the entire population.

Choose the best answer.

are in addition to the announced margin of error

Which of the following sources of error is included in the margin of error?

chance variation in choosing a random sample

62% of phone #s in LA are unlisted. A survey contacts a SRS 1000 LA numbers. 58% are unlisted.

62% is a parameter and 58% is a statistic

Which of the following is correct

parameters describe population characteristics, statistics must be based on a simple random sample

In a table of 500 random digits

Probability first # is 1 = Probability first # is 2

If we take many simple random samples from the same population, we expect

the values of the statistic will vary from sample to sample

If a sampling method is biased then

we need to improve the sampling method to remove the bias

Which of the following is a source of nonsampling error in a sample survey?

Some people not telling the truth, Undercoverage, Typos when entering data

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Stats & Finance Chapter 5 Review (You will need calculator & paper to work some problems)

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Questions 23

Answers

1
To reduce the variability of estimates from a simple random sample, you should
use a smaller sample
use a count, not a percent
use a larger sample
use a percent, not a count
2
Choose the best answer.
14, 45, 92, 60, 56
14, 03, 10, 22, 22
14, 03, 10, 22, 06
14, 31, 03, 10, 22
3
Choose the best answer.
the wording of questions has a big effect on poll results.
samples will differ just by chance due to random sampling.
the second poll suffered from undercoverage
sample sizes differ, so the margins of error are different.
4
A census is
a simple random sample from the population
a sample that attempts to include the entire population.
a count of a nation's people.
a sample that does not use chance selection.
5
Choose the best answer.
Simple random sample
Convenience sample
Voluntary response sample
Stratified random sample
6
Choose the best answer.
can be ignored, because this is a nonsampling error
can be ignored, b/c these people are not part of the pop.
are in addition to the announced margin of error
are included in Gallup's announced margin of error
7
For a SRS of size 10,881 the “quick method” gives a margin of error for 95% confidence of about
±.0096%
±9.6%
±0.96%
±0.3%
8
Which of the following sources of error is included in the margin of error?
some of the subjects did not understand the questions
chance variation in choosing a random sample
errors in entering the data into the computer
voluntary response
9
62% of phone #s in LA are unlisted. A survey contacts a SRS 1000 LA numbers. 58% are unlisted.
62% is a parameter and 58% is a statistic
58% and 62% are both statistics
58% is a parameter and 62% is a statistic
62% and 58% are both parameters
10
Which of the following is correct
parameters describe population characteristics
statistics must be based on a simple random sample
the population is a subset of the sample
parameters describe sample characteristics
11
Choose the best answer.
Stratified random sample
Simple random sample
Voluntary response sample
Convenience sample
12
In a table of 500 random digits
the number one will appear exactly 50 times
Probability first # is 1 = Probability first # is 2
the number one will appear approximately 10 times
the numbers from 1 to 10 are equally likely
13
Fill in the blank.
Undercoverage
Voluntary Response
Processing error
Nonresponse
14
If we take many simple random samples from the same population, we expect
the values of the statistic will vary from sample to sample
a different value of the parameter for each sample
a problem with bias
the same values of the statistic for each sample
15
Choose the best answer.
multi-stage sampling
stratified random sampling
Systematic sampling
Simple random sampling
16
Fill in the blank
Bias
High variability
Random Sampling Error
Margin of error
17
Choose the best answer
Parameter
Statistic
Margin of error
Confidence interval
18
If a sampling method is biased then
we should sample from a larger population
we need to improve the sampling method to remove the bias
we need to increase the sample size to remove the bias
the sample statistic will be close to the pop.parameter
19
Increasing the size of an SRS has which beneficial effect(s):
nonsampling errors become less important
the bias of the sample is reduced.
The sample no longer suffers from nonresponse
the margin of error is smaller
20
For what confidence level are margins of error usually reported?
90%
95%
99%
5%
21
Which of the following is a source of nonsampling error in a sample survey?
Voluntary response sampling
Some people not telling the truth
Undercoverage
Typos when entering data
22
Choose the best answer.
a SRS of the class
the sampling frame
a voluntary response sample
the population
23
Choose the best answer.
3.1% to 8.1%.
3% to 5%.
5% to 3%.
8.1% to 3.1%.

Stats & Finance Chapter 5 Review (You will need calculator & paper to work some problems) Flashcards | StudBud