Question

The width of a confidence interval will be:

Narrower for 98 percent confidence than for 90 percent confidence.

Wider for a sample size of 64 than for a sample size of 36.

Wider for a 99 percent confidence than for 95 percent confidence.

Narrower for a sample size of 25 than for a sample size of 36.

None of these.

Answer #1

The width of a confidence interval will be:

**Wider for 99 percent confidence than 95 percent
confidence is correct answer.**

Increasing the confidence level width of confidence interval
become wider**.**

Narrower for 98 percent confidence than for 90 percent confidence is incorrect because if confidence level increase width become wider.

Wider for a sample size of 64 than for a sample size of 36 is incorrect. Because increasing the sample size decreases the width of confidence interval because standard error decreases.

Narrower for a sample size of 25 than for a sample size of 36 is incorrect answer.

Because as sample size increses width of the confidence interval will be narrower

6) Would a 90% confidence interval for a population mean be
narrower or wider than the corresponding 95% interval?
narrower
wider
same
cannot be compared

Which of the following is TRUE?
A.
The confidence interval is narrower if the sample size is
smaller.
B.
The confidence interval is narrower if the level of significance
is smaller.
C.
The confidence interval is wider if the level of confidence
level is larger.
D.
The confidence interval is wider if the sample size is
larger.

The width of a confidence interval
estimate for a population mean when the population standard
deviation is known will
(A) become narrower if the
size of the sample being used is increased and the confidence level
is unchanged.
(B) not change if
only the sample size is increased.
(C) become wider if
the sample size remains the same and the confidence level
decreases.
(D) become narrower if the
size of the sample is decreased and the confidence level is
unchanged....

If you construct a 90% confidence interval for the population
mean instead of a 95% confidence interval and the sample size is
smaller for the 90%, but with everything else being the same, the
confidence interval would: a. remain the same b. become narrower c.
become wider d. cannot tell without further information.

Which of the following statements is true?
The 95% confidence interval is wider than the 99% confidence
interval.
The ONLY way to reduce the width of a confidence interval is to
reduce the confidence level.
The required sample size for a population mean is ONLY
dependent on population variance.
Given population variance and sampling error, higher confidence
level results in larger sample size.

A student was asked to find a 98% confidence interval for widget
width using data from a random sample of size n = 25. Which of the
following is a correct interpretation of the interval 14.2 < μ
< 24.4?
Check all that are correct.
There is a 98% chance that the mean of a sample of 25 widgets
will be between 14.2 and 24.4.
With 98% confidence, the mean width of all widgets is between
14.2 and 24.4.
The...

You are constructing a 95% confidence interval for the mean of a
normal population. If you increase your sample size from n to 4n,
the width of the confidence interval a) becomes two times wider b)
becomes two times narrower c) becomes four times narrower d)
becomes four time wider e) cannot determine from this
information
Can somebody explain please? Will upvote :) Thank you

Using the T-Table, find the following values:
a) For a 90% confidence interval with a sample size of 11, tc
=
b) For a 95% confidence interval with a sample size of 20,
tc=
c) For a 99% confidence interval with a sample size of 25,
tc=

In a random sample of 20 people with advance degree in biology,
the mean monthly income was $4744 and the standard deviation was
$580. Assume income are normally distributed. a. Construct 99%
confidence interval for the mean monthly income for people with
advance degrees in biology. b. What happens to the width of the
confidence interval if you construct a 90% confidence level. (Does
width get wider or narrower?) c. How does the width of the
confidence interval change if...

29. When the level of confidence and the sample size remain the
same, a confidence interval for a population mean µ will be _____,
when the sample standard deviation s is smaller than when s is
larger.
A. narrower
B. sometimes wider, sometimes narrower
C. wider
D. the same

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 11 minutes ago

asked 17 minutes ago

asked 22 minutes ago

asked 23 minutes ago

asked 36 minutes ago

asked 38 minutes ago

asked 38 minutes ago

asked 38 minutes ago

asked 40 minutes ago

asked 42 minutes ago

asked 53 minutes ago

asked 54 minutes ago