Question

Which one of the following statements is
**false**?

A. The extent of the interval on either side of the observed proportion is called the margin of error.

B. The critical value is the number of means away from the standard error of the sampling distribution to correspond to the specified level of

confidence.

C. We always need to check our independence assumption and the sample size assumption when constructing a confidence interval for the proportion.

D. Confidence intervals are estimates about the population parameter.

Please explain why and show work if possible. Thank you!

Answer #1

**Here' the answer to the question with full concept.
Please don't hesitate to give a "thumbs up" in case you're
satisfied with the answer**

Answer is B.

A - True, Margin of error is an interval around the mean

B - FALSE. The critical value should be the number of means away
from the **MEAN ( and not standard error)** of
sampling distribution corresponding to a level of confidence, also
called as Z

C - True. These 2 assumptions are to be met before constructing the confidence interval

D- True, its an estimate of the population parameter.

True or False:
1. A confidence interval is used for estimating a population
parameter.
2. A confidence interval always captures the sample
statistic.
3. A confidence interval always captures the population
parameter.
4. When constructing a confidence intervals we should always use
Z-critical values.
5. The margin of error determines the center location of the
confidence interval.
6. In general, we would like to have a precise confidence
interval while having a high level of confidence.

Which of the following statements is true about the confidence
interval for a population proportion?
Group of answer choices:
(A) It is equal to the population proportion plus or minus a
calculated amount called the standard error.
(B) It is equal to the sample proportion plus or minus a
calculated amount called the margin of error.
(C) The confidence interval for a proportion will always contain
the true population proportion.
(D) The confidence interval for a proportion does not need...

Which of the following statements is true with
regards to a confidence interval?
Select one:
a. The true population value is always inside the constructed
interval
b. Most calculations of confidence intervals require a point
estimate and the margin of error
c. Given the same confidence level, building a t-interval is
always narrower than a z-interval
d. A 90% confidence interval means there is a 90% chance the
population value is within the constructed interval
e. You need to know...

Consider the following statements concerning confidence interval
estimates:
A. The use of the pooled variance estimator when constructing a
confidence interval for the difference between means requires the
assumption that the population variances are equal.
B. The width of a confidence interval estimate for the proportion,
or for mean when the population standard deviation is known, is
inversely proportional to the square root of the sample size.
C. To determine the sample size required to achieve a desired
precision in...

1 - Which of the following statements is true regarding a 95%
confidence interval? Assume numerous large samples are taken from
the population.
a. In 95% of all samples, the sample proportion will fall within 2
standard deviations of the mean, which is the true proportion for
the population.
b. In 95% of all samples, the true proportion will fall within 2
standard deviations of the sample proportion.
c. If we add and subtract 2 standard deviations to/from the sample...

Question 1.
Which of the following is the CORRECT interpretation of a 95%
confidence interval?
a) There is a 95% probability that the interval contains the
population value
b) There is a 95% chance that the true population value is
inside the interval
c) if we sampled from a population repeatedly and created
confidence intervals, 95% of those confidence intervals would
contain the population mean
d) We are 95% sure of the sample statistic
Question 2.
What is the mean...

5. How heavy are the backpacks carried by college students? To
estimate the weight of
backpacks carried by college students, a researcher weighs the
backpacks from a random
sample of 58 college students. The average backpack weight
ends up being 15.7 pounds,
with a standard deviation of 2.4 pounds. If you use this data
to construct a 90% confidence
interval, what will the margin of error be for this interval?
Try not to do a lot of
intermediate rounding until...

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
E. None of the above affect the size of the margin of error
2. What percentage of couples meet through online dating
apps? A survey of a random sample of couples finds that 12% say...

1. The 95% confidence interval states that 95% of the sample
means of a specified sample size selected from a population will
lie within plus and minus 1.96 standard deviations of the
hypothesized population mean. T or F
2. Which of the following is NOT necessary to determine how
large a sample to select from a population?
Multiple Choice
The level of confidence in estimating the population
parameter
The size of the population
The maximum allowable error in estimating the...

Please show and answer all the parts of this question.
This is the Confidence Intervals for Proportions in
Statistics
Unwanted calls (including illegal and spoofed robocalls) are the
FCC's top consumer complaint. The United States is the
8th most spammed country in the world, and the annoying
calls are on the rise according to a new report. Suppose that a
spammer is testing a scheme to get people to buy something over the
phone and getting the “customer” to provide...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 2 minutes ago

asked 4 minutes ago

asked 4 minutes ago

asked 11 minutes ago

asked 11 minutes ago

asked 12 minutes ago

asked 28 minutes ago

asked 31 minutes ago

asked 31 minutes ago

asked 46 minutes ago

asked 46 minutes ago

asked 1 hour ago