Question
In: Statistics and Probability
The results of sampling independent populations: sample 1 from population 1 • mean 1000 • sample...
The results of sampling independent populations:
sample 1 from population 1
• mean 1000
• sample standard deviation 400
• sample size 50
sample 2 from population 2
• mean 1250
• sample standard deviation 400
• sample size 50
Test the HO: population 1 mean = population 2 mean at alpha = 0.01.
HA: population 1 mean =/ population2 mean. This is a two-tailed
test with both a negative lower critical value and a positive upper
critical value. Separate variances is assumed.
Solutions
orchestra answered 1 year agoRelated Solutions
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
from two populations.
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
distribution? (Round your answer down to the nearest integer.)
(c) At 95% confidence, what is the margin of...
1. Consider the following results for independent samples taken from two populations. Sample 1 Sample 2...
1. Consider the following results for independent samples taken
from two populations.
Sample 1
Sample 2
n1 = 500
n2= 200
p1= 0.45
p2= 0.34
a. What is the point estimate of the difference
between the two population proportions (to 2 decimals)?
b. Develop a 90% confidence interval for the
difference between the two population proportions (to 4 decimals).
Use z-table.
to
c. Develop a 95% confidence interval for the
difference between the two population proportions (to 4 decimals).
Use...
Consider the following results for independent random samples taken from two populations. Sample 1 Sample 2...
Consider the following results for independent random samples
taken from two populations.
Sample 1
Sample 2
n1= 10
n2 = 40
x1= 22.3
x2= 20.3
s1= 2.5
s2 = 4.1
a. What is the point estimate of the difference
between the two population means (to 1 decimal)?
b. What is the degrees of freedom for
the t distribution (round
down)?
c. At 95% confidence, what is the margin of
error (to 1 decimal)?
d. What is the 95% confidence...
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
population means?
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 independent samples taken from two populations. Sample 1 Sample 2 n1...
Consider the following results for independent samples taken
from two populations.
Sample 1
Sample 2
n1 = 400
n2= 300
p1= 0.49
p2= 0.38
Develop a 90% confidence interval for the difference between the
two population proportions (to 4 decimals). Use
z-table.
___ to ___
c. Develop a 95% confidence interval for the
difference between the two population proportions (to 4 decimals).
Use z-table.
___ to ___
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
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
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 independent samples taken from two populations. Sample 1 Sample 2 n1...
Consider the following results for independent samples taken
from two populations.
Sample 1
Sample 2
n1 = 500
n2= 200
p1= 0.42
p2= 0.31
a. What is the point estimate of the difference
between the two population proportions (to 2 decimals)?
b. Develop a 90% confidence interval for the
difference between the two population proportions (to 4 decimals).
Use z-table.
to
c. Develop a 95% confidence interval for the
difference between the two population proportions (to 4 decimals).
Use z-table....
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
= 30 x 1 = 13.8 x 2 = 11.5 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). Use z-table. ( ,
) Provide a...
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