W5 Quiz Question 1 1. For the interval estimation of μ when σ is known and the sample is large, the proper distribution to use is the normal distribution the t distribution with n degrees of freedom the t distribution with n + 1 degrees of freedom the t distribution with n + 2 degrees of freedom Question 2 1. An estimate of a population parameter that provides an interval of values believed to contain the value of the parameter is known as the confidence level interval estimate parameter value population estimate Question 3 1. The value added and subtracted from a point estimate in order to develop an interval estimate of the population parameter is known as the confidence level margin of error parameter estimate interval estimate Question 4 1. Whenever the population standard deviation is unknown and the population has a normal or near-normal distribution, which distribution is used in developing an interval estimation? standard distribution z distribution alpha distribution t distribution Question 5 1. The z value for a 97.8% confidence interval estimation is 2.02 1.96 2.00 2.29 Question 6 1. The t value for a 95% confidence interval estimation with 24 degrees of freedom is 1.711 2.064 2.492 2.069 Question 7 1. As the sample size increases, the margin of error increases decreases stays the same increases or decreases depending on the size of the mean Question 8 1. The ability of an interval estimate to contain the value of the population parameter is described by the confidence level degrees of freedom precise value of the population mean μ degrees of freedom minus 1 Question 9 1. In general, higher confidence levels provide wider confidence intervals narrower confidence intervals a smaller standard error unbiased estimates Question 10 1. An interval estimate is a range of values used to estimate the shape of the population's distribution the sampling distribution a sample statistic a population parameter Question 11 1. As the number of degrees of freedom for a t distribution increases, the difference between the t distribution and the standard normal distribution becomes larger becomes smaller stays the same becomes negative Question 12 1. In order to determine an interval for the mean of a population with unknown standard deviation a sample of 61 items is selected. The mean of the sample is determined to be 23. The number of degrees of freedom for reading the t value is 22 23 60 61 Question 13 1. After computing a confidence interval, the user believes the results are meaningless because the width of the interval is too large. Which one of the following is the best recommendation? Increase the level of confidence for the interval. Decrease the sample size. Increase the sample size. Reduce the population variance. Question 14 1. A sample of 225 elements from a population with a standard deviation.

1. W5 Quiz
Question 1
1.
For the interval estimation of μ when σ is known and the sample
is large, the proper distribution to use is
the normal distribution
the t distribution with n degrees of freedom
the t distribution with n + 1 degrees of freedom
the t distribution with n + 2 degrees of freedom
Question 2
1.
An estimate of a population parameter that provides an interval
of values believed to contain the value of the parameter is
known as the
confidence level
interval estimate
parameter value

2. population estimate
Question 3
1.
The value added and subtracted from a point estimate in order
to develop an interval estimate of the population parameter is
known as the
confidence level
margin of error
parameter estimate
interval estimate
Question 4
1.
Whenever the population standard deviation is unknown and the
population has a normal or near-normal distribution, which
distribution is used in developing an interval estimation?
standard distribution
z distribution
alpha distribution

3. t distribution
Question 5
1.
The z value for a 97.8% confidence interval estimation is
2.02
1.96
2.00
2.29
Question 6
1.
The t value for a 95% confidence interval estimation with 24
degrees of freedom is
1.711
2.064
2.492
2.069

4. Question 7
1.
As the sample size increases, the margin of error
increases
decreases
stays the same
increases or decreases depending on the size of the mean
Question 8
1.
The ability of an interval estimate to contain the value of the
population parameter is described by the
confidence level
degrees of freedom
precise value of the population mean μ
degrees of freedom minus 1
Question 9
1.
In general, higher confidence levels provide

5. wider confidence intervals
narrower confidence intervals
a smaller standard error
unbiased estimates
Question 10
1.
An interval estimate is a range of values used to estimate
the shape of the population's distribution
the sampling distribution
a sample statistic
a population parameter
Question 11
1.
As the number of degrees of freedom for a t distribution
increases, the difference between the t distribution and the
standard normal distribution

6. becomes larger
becomes smaller
stays the same
becomes negative
Question 12
1.
In order to determine an interval for the mean of a population
with unknown standard deviation a sample of 61 items is
selected. The mean of the sample is determined to be 23. The
number of degrees of freedom for reading the t value is
22
23
60
61
Question 13
1.
After computing a confidence interval, the user believes the
results are meaningless because the width of the interval is too
large. Which one of the following is the best recommendation?

7. Increase the level of confidence for the interval.
Decrease the sample size.
Increase the sample size.
Reduce the population variance.
Question 14
1.
A sample of 225 elements from a population with a standard
deviation of 75 is selected. The sample mean is 180.The 95%
confidence interval for μ is
105.0 to 225.0
175.0 to 185.0
100.0 to 200.0
170.2 to 189.8
Question 15
1.
The sample size needed to provide a margin of error of 2 or less
with a .95 probability when the population standard deviation
equals 11 is

8. 10
11
116
117
W5 Quiz
QUESTION 1
1.
For the interval estimation of μ when σ is known and the sample
is large, the
proper distribution to use is
the normal distribution
the t distribution with n degrees of freedom
the t distribution with n + 1 degrees of freedom

9. the t distribution with n + 2 degrees of freedom
QUESTION 2
1.
An estimate of a population parameter that provides an interval
of values
believed to contain the value of the parameter is known as the
confidenc
e level
interval estimate
parameter value
population estimate
QUESTION 3
1.
The value added and subtracted from a point estimate in order

10. to develop an
interval estimate of the population parameter is known as the
W5 Quiz
QUESTION 1
1.
For the interval estimation of μ when σ is known and the sample
is large, the
proper distribution to use is
the normal distribution
the t distribution with n degrees of freedom
the t distribution with n + 1 degrees of freedom
the t distribution with n + 2 degrees of freedom
QUESTION 2
1.
An estimate of a population parameter that provides an interval
of values
believed to contain the value of the parameter is known as the
confidence level
interval estimate
parameter value

11. population estimate
QUESTION 3
1.
The value added and subtracted from a point estimate in order
to develop an
interval estimate of the population parameter is known as the
W5 Assignment "National Labor Board"
· Research the National Labor Relations Board, an independent
agency that handles labor disputes.
· Read the text, and research the internet regarding the various
labor laws and procedures.
· Select one subject or area of information from your research,
and discuss what you researched and learned.
· Explain why this is important to know.
The requirements below must be met for your paper to be
accepted and graded:
· Write between 750 – 1,250 words (approximately 3 – 5 pages)
using Microsoft Word in APA style, see example below.
· Use font size 12 and 1” margins.
· Include cover page and reference page.
· At least 80% of your paper must be original content/writing.
· No more than 20% of your content/information may come
from references.
· Use at least three references from outside the course material,
one reference must be from EBSCOhost. Text book, lectures,
and other materials in the course may be used, but are not
counted toward the three reference requirement.
· Cite all reference material (data, dates, graphs, quotes,
paraphrased words, values, etc.) in the paper and list on a
reference page in APA style.
References must come from sources such as, scholarly journals
found in EBSCOhost, CNN, online newspapers such as, The
Wall Street Journal, government websites, etc. Sources such as,

12. Wikis, Yahoo Answers, eHow, blogs, etc. are not acceptable for
academic writing.
W5 Assignment "National Labor Board"
·
Research the National Labor Relations Board, an independent
agency that handles labor
disputes.
·
Read the text, and research the internet regarding the various
labor laws and
procedures.
·
Select one subject or area of information from your research,
and discuss what you
researched and learned.
·
Explain why this is important to know.
The requirements
below must be met for your paper to be accepted and graded:
·

13. Write between 750
–
1,250 words (approximately 3
–
5 pages) using Microsoft Word in
APA style, see example below.
·
Use font size 12 and 1” margins.
·
Include cover page and reference page.
·
At least
80% of your paper must be original content/writing.
·
No more than 20% of your content/information may come from
references.
·
Use at least three references from outside the course material,
one reference must be
from EBSCOhost. Text book, lectures, and other
materials in the course may be used,
but are not counted toward the three reference requirement.

14. ·
Cite all reference material (data, dates, graphs, quotes,
paraphrased words, values, etc.)
in the paper and list on a reference page in APA style.
References m
ust come from sources such as, scholarly journals found in
EBSCOhost, CNN, online
newspapers such as, The Wall Street Journal, government
websites, etc. Sources such as, Wikis, Yahoo
Answers, eHow, blogs, etc. are not acceptable for academic
writing.
W5 Assignment "National Labor Board"
agency that handles labor
disputes.
labor laws and
procedures.
nformation from your research,
and discuss what you
researched and learned.
The requirements below must be met for your paper to be
accepted and graded:
– 1,250 words (approximately 3 – 5
pages) using Microsoft Word in
APA style, see example below.

15. ome
from references.
one reference must be
from EBSCOhost. Text book, lectures, and other materials in
the course may be used,
but are not counted toward the three reference requirement.
paraphrased words, values, etc.)
in the paper and list on a reference page in APA style.
References must come from sources such as, scholarly journals
found in EBSCOhost, CNN, online
newspapers such as, The Wall Street Journal, government
websites, etc. Sources such as, Wikis, Yahoo
Answers, eHow, blogs, etc. are not acceptable for academic
writing.