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Question 8 of 8

Calculate the margin of error and construct the confidence interval for the population mean (you may assume the population data is normally distributed):

Standard Normal Distribution Table

**a.** x̄ =6.138,n=316, σ =0.941, α =0.05 x̄
=6.138,n=316, σ =0.941, α =0.05

E=E=

Round to 3 significant digits

< μ < < μ <

Round to 3 decimal places

**b.** x̄ =17.63,n=625, σ =3.44, α =0.01 x̄
=17.63,n=625, σ =3.44, α =0.01

E=E=

Round to 3 significant digits

< μ < < μ <

Round to 2 decimal places

Answer #1

Question 8 of 8
Calculate the margin of error and construct the confidence
interval for the population mean (you may assume the population
data is normally distributed):
Standard Normal Distribution Table
a. x̄ =6.138,n=316, σ =0.941, α =0.05 x̄
=6.138,n=316, σ =0.941, α =0.05
E=E=
Round to 3 significant digits
< μ < < μ <
Round to 3 decimal places
b. x̄ =17.63,n=625, σ =3.44, α =0.01 x̄
=17.63,n=625, σ =3.44, α =0.01
E=E=
Round to 3 significant digits
<...

(a)
Construct a 95% confidence interval about
Mu μ if the sample size, n, is 34
Lower bound:
___________
; Upper bound:
______________
(Use ascending order. Round to two decimal places as
needed.)
(b) Construct a 95% confidence interval about mu μ if
the sample size, n, is 51.
Lower bound:
____________
; Upper bound:
____________
(Use ascending order. Round to two decimal places as
needed.)
How does increasing the sample size affect the margin
of error, E?
A.
The...

Calculate the margin of error of a confidence interval for the
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σ1=5.94σ1=5.94, n1=98n1=98,
σ2=2.87σ2=2.87, n2=79n2=79, α=0.05

Determine the margin of error for an 80% confidence interval to
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sample sizes. a) n equals 35 b) n equals 41 c) n equals 60 Click
the icon to view the cumulative probabilities for the standard
normal distribution
. a) When nequals35, the margin of error for an 80%
confidence interval is____. (Round to two decimal places as
needed.)
b) When nequals41, the margin of error for an 80% confidence
interval...

Use the t-distribution to find a confidence interval
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estimate for μ, the margin of error, and the confidence interval.
Assume the results come from a random sample from a population that
is approximately normally distributed.
A 95% confidence interval for μ using the sample results x̄ = 79.7,
s = 6.6, and n=42
Round your answer for the point estimate to one decimal place, and
your answers...

Use the t-distribution to find a confidence interval
for a mean μ given the relevant sample results. Give the best point
estimate for μ, the margin of error, and the confidence interval.
Assume the results come from a random sample from a population that
is approximately normally distributed.
A 95% confidence interval for μ using the sample results x̄ = 79.7,
s = 6.6, and n = 42
Round your answer for the point estimate to one decimal place, and...

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mean.
Given: n = 15; X̄ = 104.8; s = 3. Assume the population is normal.
Round answer to 3 decimal places.

Given a (1- ∝)% confidence interval for population mean; μ is
[54.15 , 56.25].
Find the value of: (a) the unbiased point estimator; ( sample
mean; ⨰ ) for the population mean.
(b) the margin of error, E.
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Construct the confidence interval for the population mean μ.
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A 95% confidence interval form μ is(_,_) (Round to two decimal
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Use the confidence interval, (36.482, 41.352), to answer the
questions.
What is the margin of error, E?
What is the sample mean, x?
Let c = 0.99, σ = 3.7, and E = 2.2. What is the minimum sample
size, n, needed to estimate μ

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