Question
It is desired to determine whether there is less variability in the silver plating done by...
It is desired to determine whether there is less variability in the silver plating done by Company 1 than in that done by Company 2. If independent random samples of size 12 of the two companies’ work yield standard deviations s1 = 0.035 mil and s2 = 0.062 mil respectively, test the null hypothesis that there is no difference in variances (σ1^2 = σ2^2) against the alternative hypothesis that variance of company 1 is smaller as compared to variance of company 2 (σ1^2 < σ2^2) at the 0.05 level of significance.
Homework Answers
Answer #1
The solution to this problem is given by
Not the answer you're looking for?
Similar Questions
12 independent random samples are collected from each of two silver plating companies. The samples yield...
12 independent random samples are collected from each of two
silver plating companies. The samples yield standard deviations of
S1= 0.035 mil and S2 = 0.062 mil. Do the data support, with 95%
confidence, the contention that the plating done by Company 1 is
less variable than that done by Company 2?
1) A demographer wants to measure life expectancy in countries 1 and 2. Let μ1 and...
1) A demographer wants to measure life expectancy in countries 1
and 2. Let μ1 and μ2 denote the mean life expectancy in countries 1
and 2, respectively. Specify the hypothesis to determine if life
expectancy in country 1 is more than 10 years lower than in country
2.
A) H0:μ1– μ2≤10, HA:μ1– μ2>10
B) H0:μ1– μ2≥10, HA: μ1– μ2<10
C)H0:μ1– μ2≤–10, HA:μ1– μ2>−10
D)H0:μ1– μ2≥–10, HA:μ1– μ2<−10
2) A restaurant chain has two locations in a medium-sized town
and,...
An economist wonders if corporate productivity in some countries is more volatile than in other countries....
An economist wonders if corporate productivity in some countries
is more volatile than in other countries. One measure of a
company's productivity is annual percentage yield based on total
company assets.
A random sample of leading companies in France gave the following
percentage yields based on assets.
4.6
5.6
3.4
3.9
2.7
3.5
2.8
4.4
5.7
3.4
4.1
6.8
2.9
3.2
7.2
6.5
5.0
3.3
2.8
2.5
4.5
Use a calculator to verify that the sample variance is
s2 ≈...
An economist wonders if corporate productivity in some countries is more volatile than in other countries....
An economist wonders if corporate productivity in some countries
is more volatile than in other countries. One measure of a
company's productivity is annual percentage yield based on total
company assets.
A random sample of leading companies in France gave the following
percentage yields based on assets.
4.2
5.3
3.4
3.1
2.7
3.5
2.8
4.4
5.7
3.4
4.1
6.8
2.9
3.2
7.2
6.5
5.0
3.3
2.8
2.5
4.5
Use a calculator to verify that the sample variance is
s2 ≈...
An economist wonders if corporate productivity in some countries is more volatile than in other countries....
An economist wonders if corporate productivity in some countries
is more volatile than in other countries. One measure of a
company's productivity is annual percentage yield based on total
company assets.
A random sample of leading companies in France gave the following
percentage yields based on assets.
4.2
5.4
3.2
3.4
2.9
3.5
2.8
4.4
5.7
3.4
4.1
6.8
2.9
3.2
7.2
6.5
5.0
3.3
2.8
2.5
4.5
Use a calculator to verify that the sample variance is
s2 ≈...
An economist wonders if corporate productivity in some countries is more volatile than in other countries....
An economist wonders if corporate productivity in some countries
is more volatile than in other countries. One measure of a
company's productivity is annual percentage yield based on total
company assets.
A random sample of leading companies in France gave the following
percentage yields based on assets.
4.2
5.3
3.1
3.9
2.4
3.5
2.8
4.4
5.7
3.4
4.1
6.8
2.9
3.2
7.2
6.5
5.0
3.3
2.8
2.5
4.5
Use a calculator to verify that the sample variance is
s2 ≈...
An economist wonders if corporate productivity in some countries is more volatile than in other countries....
An economist wonders if corporate productivity in some countries
is more volatile than in other countries. One measure of a
company's productivity is annual percentage yield based on total
company assets.
A random sample of leading companies in France gave the following
percentage yields based on assets.
4.7
5.2
3.6
3.7
2.1
3.5
2.8
4.4
5.7
3.4
4.1
6.8
2.9
3.2
7.2
6.5
5.0
3.3
2.8
2.5
4.5
Use a calculator to verify that the sample variance is
s2 ≈...
An economist wonders if corporate productivity in some countries is more volatile than in other countries....
An economist wonders if corporate productivity in some countries
is more volatile than in other countries. One measure of a
company's productivity is annual percentage yield based on total
company assets.
A random sample of leading companies in France gave the following
percentage yields based on assets.
4.6
5.1
3.1
3.8
2.9
3.5
2.8
4.4
5.7
3.4
4.1
6.8
2.9
3.2
7.2
6.5
5.0
3.3
2.8
2.5
4.5
Use a calculator to verify that the sample variance is
s2 ≈...
An economist wonders if corporate productivity in some countries is more volatile than in other countries....
An economist wonders if corporate productivity in some countries
is more volatile than in other countries. One measure of a
company's productivity is annual percentage yield based on total
company assets.
A random sample of leading companies in France gave the following
percentage yields based on assets.
4.2
5.2
3.7
3.9
2.5
3.5
2.8
4.4
5.7
3.4
4.1
6.8
2.9
3.2
7.2
6.5
5.0
3.3
2.8
2.5
4.5
Use a calculator to verify that the sample variance is
s2 ≈...
An economist wonders if corporate productivity in some countries is more volatile than in other countries....
An economist wonders if corporate productivity in some countries
is more volatile than in other countries. One measure of a
company's productivity is annual percentage yield based on total
company assets. A random sample of leading companies in France gave
the following percentage yields based on assets. 4.3 5.9 3.2 3.5
2.3 3.5 2.8 4.4 5.7 3.4 4.1 6.8 2.9 3.2 7.2 6.5 5.0 3.3 2.8 2.5 4.5
Use a calculator to verify that the sample variance is s2 ≈...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 15 minutes ago
asked 16 minutes ago
asked 26 minutes ago
asked 39 minutes ago
asked 41 minutes ago
asked 41 minutes ago
asked 44 minutes ago
asked 47 minutes ago
asked 50 minutes ago
asked 54 minutes ago
asked 1 hour ago
asked 1 hour ago