Question

Find a confidence interval for μ assuming that each sample is from a normal population. (Round the value of t to 3 decimal places and your final answers to 2 decimal places.)

(a) x⎯⎯ = 28, s = 5, n = 8, 90 percent confidence. The 90% confidence interval is to

(b) x⎯⎯ = 50, s = 6, n = 15, 99 percent confidence. The 99% confidence interval is to

(c) x⎯⎯ = 111, s = 11, n = 29, 95 percent confidence. The 95% confidence interval is to rev: 05_15_2015_QC_CS-15690

Answer #1

Find a confidence interval for μ assuming that each sample is
from a normal population. (Round the value of t to 3 decimal places
and your final answers to 2 decimal places.)
(a) 1formula63.mml = 22, s = 3, n = 6, 90 percent
confidence.
The 90% confidence interval is to (b) 1formula63.mml = 40, s =
4, n = 19, 99 percent confidence. The 99% confidence interval is to
(c) 1formula63.mml = 123, s = 10, n = 20,...

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 90% confidence interval for μ using the sample results x¯=144.2,
s=55.7, and n=50
Round your answer for the point estimate to one decimal place, and
your answers for the margin of...

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 90% confidence interval for μ using the sample results x¯=142.0,
s=52.8, and n=50
Round your answer for the point estimate to one decimal place, and
your answers for the margin of...

Find a 90% confidence interval for a population mean μ for these
values. (Round your answers to three decimal places.)
(a)n = 130, x = 0.82, s2 = 0.085
______ to _______
(b)n = 40, x = 22.7, s2 = 3.19
_______ to _______

Use the sample information x¯x¯ = 36, σ = 7, n
= 20 to calculate the following confidence intervals for μ
assuming the sample is from a normal population.
(a) 90 percent confidence. (Round your
answers to 4 decimal places.)
The 90% confidence interval is from to
(b) 95 percent confidence. (Round your
answers to 4 decimal places.)
The 95% confidence interval is from to
(c) 99 percent confidence. (Round your
answers to 4 decimal places.)
The 99% confidence...

Find the interval [μ−z σn√,μ+z σn√] within which 95 percent of
the sample means would be expected to fall, assuming that each
sample is from a normal population. (a) μ = 206, σ = 15, n = 48.
(Round your answers to 2 decimal places.) The 95% range is from to
. (b) μ = 1,071, σ = 14, n = 11. (Round your answers to 2 decimal
places.) The 95% range is from to . (c) μ = 47,...

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 x¯=94.5,
s=8.5, and n=42
Round your answer for the point estimate to one decimal place, and
your answers for the margin of...

Use the sample information x¯ = 34, σ = 4,
n = 10 to calculate the following confidence intervals for
μ assuming the sample is from a normal population.
(a) 90 percent confidence. (Round your
answers to 4 decimal places.)
The 90% confidence interval is from to
(b) 95 percent confidence. (Round your
answers to 4 decimal places.)
The 95% confidence interval is from to
(c) 99 percent confidence. (Round your
answers to 4 decimal places.)
The...

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 90% confidence interval for μ using the sample results x¯=3.5,
s=0.4, and n=100
Round your answer for the point estimate to one decimal place, and
your answers for the margin of...

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
your answers...

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