Question

Give a 90% confidence interval, for μ 1 − μ 2 given the following information. n 1 = 30 , ¯ x 1 = 2.38 , s 1 = 0.58 n 2 = 40 , ¯ x 2 = 2.87 , s 2 = 0.91 ±

Answer #1

Give a 95% confidence interval, for μ 1 − μ 2 given the
following information.
n 1 = 30 , ¯ x 1 = 2.79 , s 1 = 0.91
n 2 = 35 , ¯ x 2 = 2.62 , s 2 = 0.68
____±____ Use Technology Rounded to 2 decimal places.
How do I solve this using technlology?

use the information given to compute a confidence interval for
the population mean μ
x̅ = 102, s = 18, n = 81, 90% confidence
level
x̅ = 102, s = 18, n = 81, 99% confidence level

3. Construct a 98% confidence interval estimate for the mean
μ using the given sample information. (Give your answers
correct to two decimal places.)
n = 26, x = 18, and s = 2.7

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...

Construct a 90% confidence interval of the population
proportion using the given information. x=40, n=200
The lower bound is?
The upper bound is?
(round to three decimal places as needed)

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¯=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...

Use the given degree of confidence and sample data to construct
a confidence interval for the population mean μ. Assume that the
population has a normal distribution.
n =30,x bar =84.6, s=10.5, 90% confidence
.
A.79.32 <μ <89.88
B.81.34 <μ <87.86
C. 80.68 <μ <88.52
D.81.36 <μ <87.84

) Given the values x,
S, and n, form a 99%
confidence interval for σᶻ
x =15.1, s = 4.3, n = 24
A) 2.38, 9.7)
B) (10.04, 47.92)
C) (9.63, 45.92)
D) (10.21, 41.71)

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 _______

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