Question
In: Statistics and Probability
The following results come from two independent random samples taken of two populations. Sample 1 Sample...
The following results come from two independent random samples taken of two populations.
| Sample 1 | Sample 2 |
|---|---|
|
n1 = 60 |
n2 = 35 |
|
x1 = 13.6 |
x2 = 11.6 |
|
σ1 = 2.5 |
σ2 = 3 |
(a)
What is the point estimate of the difference between the two population means? (Use
x1 − x2.)
(b)
Provide a 90% confidence interval for the difference between the two population means. (Use
x1 − x2.
Round your answers to two decimal places.)
to
(c)
Provide a 95% confidence interval for the difference between the two population means. (Use
x1 − x2.
Round your answers to two decimal places.)
Solutions
Expert Solution
a) Point estimate is 2.4
b)
c)
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orchestra answered 1 year agoRelated Solutions
he following results come from two independent random samples taken of two populations. Sample 1 n1...
he following results come from two independent random samples
taken of two populations.
Sample 1 n1 = 60, x1 = 13.6, σ1 = 2.4
Sample 2 n2 = 25, x2 = 11.6,σ2 = 3
(a) What is the point estimate of the difference between the two
population means? (Use x1 − x2.)
(b) Provide a 90% confidence interval for the difference between
the two population means. (Use x1 − x2. Round your answers to two
decimal places.)
(BLANK) to (BLANK)...
3. The following results come from two independent random samples taken from two populations. Sample Size...
3.
The following results come from two independent random samples
taken from two populations.
Sample Size
Sample Mean
Population Standard Deviation
Sample 1
n1=52
x1=15.4
σ1=3.1
Sample 2
n2=64
x2=17.3
σ2=4.2
Provide a 95% confidence interval for the difference between
two population means.
Using the critical value approach, test whether the population
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Using the p-value approach, test whether the
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The following results are for independent random samples taken from two populations. Sample 1 Sample 2...
The following results are for independent random samples taken
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Sample 1
Sample 2
n1 = 20
n2 = 30
x1 = 22.8
x2 = 20.1
s1 = 2.3
s2 = 4.8
(a) What is the point estimate of the difference between the two
population means? (Use x1 − x2.)
(b) What is the degrees of freedom for the t
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(c) At 95% confidence, what is the margin of...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample...
Consider the following results for two
independent random samples taken from two populations.
Sample 1
Sample 2
n1 = 50
n2 = 30
x1 = 13.4
x2 = 11.7
σ1 = 2.3
σ2 = 3
What is the point estimate of the difference between the two
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Provide a 90% confidence interval for the difference between
the two population means (to 2 decimals).
( , )
Provide a 95% confidence interval for the difference between
the two population means...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample...
Consider the following results for two independent random
samples taken from two populations.
Sample 1
Sample 2
n 1 = 50
n 2 = 35
x 1 = 13.1
x 2 = 11.5
σ 1 = 2.4
σ 2 = 3.2
What is the point estimate of the difference between the two
population means? (to 1 decimal)
Provide a 90% confidence interval for the difference between
the two population means (to 2 decimals). Use
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( , )
Provide a 95%...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample...
Consider the following results for two independent random
samples taken from two populations.
Sample 1
Sample 2
n 1 = 50
n 2 = 35
x 1 = 13.6
x 2 = 11.1
σ 1 = 2.4
σ 2 = 3.4
What is the point estimate of the difference between the two
population means? (to 1 decimal)
Provide a 90% confidence interval for the difference between
the two population means (to 2 decimals).
Provide a 95% confidence interval for the...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample...
Consider the following results for two independent random
samples taken from two populations.
Sample 1
Sample 2
n 1 = 40
n 2 = 30
x 1 = 13.1
x 2 = 11.1
σ 1 = 2.3
σ 2 = 3.4
What is the point estimate of the difference between the two
population means? (to 1 decimal)
Provide a 90% confidence interval for the difference between
the two population means (to 2 decimals). Use
z-table.
( , )
Provide a 95%...
Consider the following results for two independent random samples taken from two populations. Sample 1 Sample...
Consider the following results for two independent random
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Consider the following results for two independent random samples taken from two populations. Sample 1: n1...
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Sample 1:
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x̅1 = 13.9
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Sample 2:
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σ2 = 3.4
What is the point estimate of the difference between the two
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Provide a 90% confidence interval for the difference between the
two population means (to 2 decimals).
Provide a 95% confidence interval for the difference between the
two population means...
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