Question

1. From the following confidence interval for µ1 - µ2: [-0.32,
0.86], the following can be concluded

Select one:

a) That there is no significant difference between the means of
both populations

b)That both stockings are small

c)That µ2 is greater than µ1

d)That µ1 is greater than µ2

2. If a confidence interval is constructed at a confidence level
of 99% instead of 95%

Select one:

a)Estimation precision decreases

b)The precision of the estimate is not altered

c)Estimation accuracy improves significantly

d)We can accurately calculate the value of the parameter of
interest

Answer #1

1. Given,

confidence interval for µ1 - µ2: [-0.32, 0.86]

Since the confidence interval includes 0, so we can conclude that there is no significant difference between the means of both populations

ans-> a) That there is no significant difference between the means of both populations

2.If a confidence interval is constructed at a confidence level of
99% instead of 95%

ans-> c) Estimation accuracy improves significantly,

as level of confidence increased.

If a confidence interval is constructed at a confidence level of 99% instead of 95%:
a)Estimation precision decreases
b)The precision of the estimate is not altered
c)We can accurately calculate the value of the parameter of interest
d)Estimation accuracy improves significantly

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Test ONE claim about a population parameter by collecting your
own data or using our class survey data. Include your
written claim, hypothesis in both
symbolic and written form, relevant statistics
(such as sample means, proportions etc.), test
statistic, p-value (or critical value),
conclusion, and interpretation of
your conclusion in the context of your claim. Use a 0.05
significance level.
You will also construct a 95% confidence interval
estimate of...

1. When constructing a confidence interval to estimate a
population proportion, what affects the size of the margin of
error?
A. The sample size
B. The sample proportion
C. The confidence level
D. All of the above affect the size of the margin of error
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An investigator is looking at the relationship between
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study. After collecting information about the height of each
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1.The sample mean is an unbiased estimator for
the population mean. This means:
The sample mean always equals the population mean.
The average sample mean, over all possible samples, equals the
population mean.
The sample mean will only vary a little from the population
mean.
The sample mean has a normal distribution.
2.Which of the following statements is
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The standard error of the sample mean will decrease as the
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I. Choose the best answer for each
multiple choice. Please use CAPITAL letters to indicate your answer
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1. ____ 4.____ 7. ____ 10.____ 13.
____
2. ____ 5.____ 8. ____ 11.____ 14.
____
3. ____ 6.____ 9. ____ 12.____ 15.
____
Whenever the population standard deviation is unknown and the
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B....

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I.Process capability.
II. Data patters outside of the control limits.
III. Data patters within the control limits.
IV. Points randomly falling above and below the control chart
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a.
II and III
b.
II, III, IV
c.
I, II, IV
d.
I, II, III, IV
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Please answer the following Case
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