Question
In testing a claim that the three different samples have the same mean, following sample results...
In testing a claim that the three different samples have the same mean, following sample results have been obtained:
|
Sample 1 |
Sample 2 |
Sample 3 |
|
= 6 |
= 6 |
= 6 |
|
= 19 |
= 20 |
= 18 |
|
= 3 |
= 4 |
= 5 |
Find the variance within the samples i.e. ?
(Roundoff the answer to two decimal digits)
Homework Answers
Answer #1
There are 3 samples here, we first compute the mean for each sample here as:
Therefore, the variation within samples now is computed here as:
Therefore 401.33 is the required variance here.
Not the answer you're looking for?
Similar Questions
In testing a claim that the three different samples have the same mean, following sample results...
In testing a claim that the three different samples have the
same mean, following sample results have been obtained:
Sample 1
Sample 2
Sample 3
= 6
= 6
= 6
= 19
= 20
= 18
= 3
= 4
= 2
Find the variance within the samples i.e. ?
(Roundoff the answer to two decimal
digits)
In testing a claim that the three different samples have the same mean, following sample results...
In testing a claim that the three different samples have the
same mean, following sample results have been obtained:
Sample 1
Sample 2
Sample 3
Sample Size (n)
5
5
5
Sample Mean ()
11
12
13
Sample Variance(s2)
2
1
?
If the variance within the samples
i.e.(SP)2 = 2 (given), then the missing value
of (s3)2 is
3
4
1
6
At the 0.01 significance level, test the claim that the three brands have the same mean...
At the 0.01 significance level, test the claim that the three
brands have the same mean level if the following sample results
have been obtained. Use Anova.
Brand A
Brand B
Brand C
32
27
22
34
24
25
37
33
32
33
30
22
36
21
39
Claim:
Null Hypothesis:
Alternative Hypothesis:
Calculator Screen Name in Ti 183:
test statistics:
Pvalue/alpha conversion
decision:
Conclusion:
In testing a new drug, we obtained the following results: Placebo Drug A Drug B Drug...
In testing a new drug, we obtained the following results:
Placebo
Drug A
Drug B
Drug C
3
4
6
5
0
3
3
4
2
1
4
3
0
1
3
2
0
1
4
1
Run the ANOVA and fill in the summary table with the results
obtained:
SS
df
MS
F-ratio
p-value
Between
3
Within
16
TOTAL
19
(Report P-value & F-ratio accurate to 3
decimal places and all other values accurate to 2 decimal
places.)
What...
You are testing the claim that the mean GPA of night students is different than the...
You are testing the claim that the mean GPA of night students is
different than the mean GPA of day students.
You sample 35 night students, and the sample mean GPA is 2.84 with
a standard deviation of 0.75
You sample 30 day students, and the sample mean GPA is 2.42 with a
standard deviation of 0.43
Calculate the test statistic, rounded to 3 decimal places
You are testing the claim that the mean GPA of night students is different than the...
You are testing the claim that the mean GPA of night students is
different than the mean GPA of day students.
You sample 60 night students, and the sample mean GPA is 2.93 with
a standard deviation of 0.67
You sample 40 day students, and the sample mean GPA is 2.58 with a
standard deviation of 0.57
Calculate the test statistic, rounded to 2 decimal places
The following data represent the results from an independent-measures experiment comparing three treatment conditions. Use a...
The following data represent the results from an
independent-measures experiment comparing three treatment
conditions. Use a spreadsheet to conduct an analysis of variance
with α=0.05α=0.05 to determine whether these data are sufficient to
conclude that there are significant differences between the
treatments.
Treatment A
Treatment B
Treatment C
12
12
16
12
11
18
12
13
15
11
14
17
13
15
19
F-ratio =
p-value =
The results obtained above were primarily due to the mean for
the third...
Suppose random samples of the same size are taken from two different populations with the same...
Suppose random samples of the same size are taken from two
different populations with the same mean but different standard
deviations. If you make two confidence intervals, one from each
sample, and these intervals have the same confidence level, how
will the confidence intervals differ? Explain.
1. Assume you have two independent samples having the same sample size. If the variance for...
1. Assume you have two independent samples having the same
sample size. If the variance for the first sample is 50 and the
variance for the second sample is 40, then the pooled variance for
these two samples is 45.
True /False
2.
An F test for the equality of two population variances can be a
two-tailed test or a one-tailed test.
True
False
3.
A Chi-Square test is often used to determine if there is a
significant relationship between...
You are testing the claim that the mean GPA of night students is different from the...
You are testing the claim that the mean GPA of night students is
different from the mean GPA of day students. You sample 25 night
students, and the sample mean GPA is 2.23 with a standard deviation
of 0.93. You sample 60 day students, and the sample mean GPA is
2.05 with a standard deviation of 0.54. Test the claim using a 10%
level of significance. Assume the population standard deviations
are unequal and that GPAs are normally distributed.
H0:...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 13 minutes ago
asked 41 minutes ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 1 hour ago
asked 2 hours ago
asked 2 hours ago