Question

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?

Answer #1

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 ±

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

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 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
x̅=10.4, s=5.3, and n=30.
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 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...

QUESTION 5 Construct a 95% confidence interval for μ 1 - μ 2.
Two samples are randomly selected from normal populations.
The sample statistics are given below. n 1 = 8 n 2 = 7 1 = 4.1 2
= 5.5 s 1 = 0.76 s 2 = 2.51 (-1.132, 1.543) (2.112, 2.113) (-1.679,
1.987) (-3.813, 1.013)

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...

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...

Give a 99.9% confidence interval, for μ1−μ2μ1-μ2 given the
following information.
n1=50n1=50, ¯x1=2.32x¯1=2.32, s1=0.68s1=0.68
n2=35n2=35, ¯x2=1.98x¯2=1.98, s2=0.38s2=0.38
For degrees of freedom, use the smaller of
(n1−1)(n1-1) and (n2−1)(n2-1)
tα2tα2 = tinv(α, df)
SE = sqrt((s1s1)^2 / n1n1 + (s2s2)^2 / n2n2)
E = tα2tα2 * SE
CI = (¯x1−¯x2)±E(x¯1-x¯2)±E
Rounded both solutions to 2 decimal places.
Can I have this done in excel please?

Use the given data to find the 95% confidence interval estimate
of the population mean μ. Assume that the population has a normal
distribution. IQ scores of professional athletes: Sample size n=30
Mean x¯¯¯=103 Standard deviation s=12

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