Question

The following information was obtained from independent
random samples. The Degrees of Freedom have be calculated
to be 19. The Standard Deviations are
Unknown. |
||||||

Small Sample Size: Use t-value |
||||||

Sample 1 |
Sample 2 |
|||||

Sample Mean | 45 | 42 | ||||

Sample Variance | 85 | 90 | ||||

Sample Standard Deviation | ||||||

Sample Size | 10 | 12 | ||||

Standard Error | ||||||

Confidence Coefficient | 0.95 | |||||

Level of Significance | ||||||

Degrees of Freedom | 19 | |||||

t-value | ||||||

Margin of Error | ||||||

Point Estimate of Difference | 3 | |||||

Lower Limit | ||||||

Upper Limit | ||||||

The point estimate for the difference between the means of the two populations is: | ||||||

Answer #1

The following results are for independent random samples taken
from two populations.
Sample 1
Sample 2
n1 = 40
n2 = 50
x1 = 32.2
x2 = 30.1
s1 = 2.6
s2 = 4.3
(a) What is the point estimate of the difference between the two
population means?
(b) What is the degrees of freedom for the t
distribution?
(c) At 95% confidence, what is the margin of error?
(d) What is the 95% confidence interval for the difference
between...

Consider the following results for independent random samples
taken from two populations.
Sample 1
Sample 2
n 1 = 20
n 2 = 40
x 1 = 22.1
x 2 = 20.9
s 1 = 2.4
s 2 = 4.7
What is the point estimate of the difference between the two
population means (to 1 decimal)?
What is the degrees of freedom for the t distribution
(round down your answer to nearest whole number)?
At 95% confidence, what is the...

Consider the following results for independent random samples
taken from two populations.
Sample 1
Sample 2
n 1 = 10
n 2 = 30
x 1 = 22.5
x 2 = 20.5
s 1 = 2.5
s 2 = 4.6
What is the point estimate of the difference between the two
population means (to 1 decimal)?
What is the degrees of freedom for the t distribution
(round down your answer to nearest whole number)?
At 95% confidence, what is the...

Consider the following results for independent random samples
taken from two populations.
Sample 1
Sample 2
n 1 = 10
n 2 = 30
x 1 = 22.5
x 2 = 20.5
s 1 = 2.5
s 2 = 4.6
What is the point estimate of the difference between the two
population means (to 1 decimal)?
What is the degrees of freedom for the t distribution
(round down your answer to nearest whole number)?
At 95% confidence, what is the...

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 = 2.6
s2 = 4.6
(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...

The following results are for independent random samples taken
from two populations.
Sample 1
Sample 2
n1 = 20
n2 = 30
x1 = 22.5
x2 = 20.1
s1 = 2.2
s2 = 4.6
(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...

The following results are for independent random samples taken
from two populations.
Sample 1
Sample 2
n1 = 20
n2 = 30
x1 = 22.5
x2 = 20.1
s1 = 2.9
s2 = 4.6
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...

UCF College of Business obtained the following results from two
independent random samples on the salaries of a
recent graduating class:
Sample Economics (1) Majors
Sample Marketing (2) Majors
Sample Size Economics Majors =36
Sample Size Marketing Majors =54
Mean Sample Economics = $51,230
Mean Sample Marketing =$49,300
Standard Deviation Sample Economics =$1,035
Standard Deviation Sample Marketing =$1,450
Managerial Report
Prepare a managerial report that addresses the following
issues:
What is the degrees of freedom for the t distribution (round...

The following information was obtained from two independent
samples selected from two normally distributed populations with
unknown but equal standard deviations. Sample 1 13 14 9 12 8 10 5
10 9 12 16 Sample 2,16,18,11,19,14,17,13,16,17,18,22,12.
a. Let μ 1 be the mean of population 1 and μ 2 be the mean of
population 2. What is the point estimate μ 1 − μ 2 ? Round your
answer to two decimal places. The point estimate μ 1 − μ...

Independent random samples were selected from two quantitative
populations, with sample sizes, means, and standard deviations
given below. n1 = n2 = 80, x1 = 125.3, x2 = 123.6, s1 = 5.7, s2 =
6.7
Construct a 95% confidence interval for the difference in the
population means (μ1 − μ2). (Round your answers to two decimal
places.)
Find a point estimate for the difference in the population
means.
Calculate the margin of error. (Round your answer to two decimal
places.)

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 16 minutes ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago