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?

Give a 95% confidence interval, for μ 1 − μ 2 given the
following information. n 1 = 20 , X-Bar 1 = 2.82 , s 1 = 0.42 n 2 =
40 , X-Bar 2 = 2.95 , s 2 = 0.67 Rounded both solutions to 2
decimal places.

4. Construct the confidence interval for μ 1 − μ 2 for the level
of confidence and the data from independent samples given. 99.5%
confidence: n 1 = 40, x - 1 = 85.6, s 1 = 2.8 n 2 = 20, x - 2 =
73.1, s 2 = 2.1 99.9% confidence: n 1 = 25, x - 1 = 215, s 1 = 7 n
2 = 35, x - 2 = 185, s 2 = 12

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 a t-distribution to find a confidence interval for the
difference in means - μ 2 using the relevant sample results from
paired data. Assume the results come from random samples from
populations that are approximately normally distributed, and that
differences are computed using d = x 1 - x 2 . A 90% confidence
interval for μ d using the paired difference sample results x ¯ d =
566.9 , s d = 140.3 , n d = 100...

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