Question
7. Listed below are test scores of 5 subjects. The subjects were tested before the class...
7. Listed below are test scores of 5 subjects. The subjects were tested before the class began and then after the class was completed. Use a significance level of .05 to test that the mean differences of the test scores are different.
Pre-test Post-test
Bill 6 9
Sue 5 6
Anne 8 9
Jim 8 7
Rachel 7 8
Homework Answers
Answer #1
Paired t test is used to solve the given problem
Not the answer you're looking for?
Similar Questions
The effect of social competence training is tested. 12 Subjects are tested before and after the...
The effect of social competence training is tested. 12 Subjects
are tested before and after the training for social competence on a
seven point scale. Data are ordinal scaled and not normally
distributed. The question is, if social competence is enhanced by
the training. Use Sign Test. Raw data are listed in the following
table:
Before 5
3
4
2
1
6
7
3
2
3
5 1
After
6
2
4
4
3
6
7
5
3
5
5 ...
consider the data of pretest and post test scores X1 (pre) X2(post) 2 5 3 7...
consider the data of pretest and post test scores
X1 (pre) X2(post)
2 5
3 7
6 11
5 9
perform a related-samples t-test on above data. a)
Conducting a two tailed
hypothesis test at the alpha = 0.01 what is the critical t
value?
b) what is the obtained t value that you
calculated from the above dataset?
c) given the obtained t and critical t
values, is the mean of the difference scores statistically
significant why...
The difference(after-before) in the score on a cognitive function test before and after the drug Adderall...
The difference(after-before) in the score on a cognitive
function test before and after the drug Adderall was given to 10
test subjects is 4, 5, 10, -5, -1, 12, 3, 15, -6, 9. Test the
claim, at the 1% significance level, that Adderall improved test
scores. Find the 99% confidence interval for the difference in test
scores.
The difference(after-before) in the score on a cognitive function test before and after the drug Adderall...
The difference(after-before) in the score on a cognitive
function test before and after the drug Adderall was given to 10
test subjects is 4, 5, 10, -5, -1, 12, 3, 15, -6, 9. Test the
claim, at the 1% significance level, that Adderall improved test
scores.
14. Find the 99% confidence interval for the difference in
test scores in problem #14.
Suppose a sample of 8 students were given a diagnostic test before studying a particular module...
Suppose a sample of 8 students were given a diagnostic test
before studying a particular module and then again after completing
the module. We want to find out if, in general, our teaching leads
to improvements in students’ knowledge/skills (i.e. test
scores).
Student Pre-Module Score Post-Module Score
1 16 17
2 21 25
3 16 15
4 22 24
5 19 16
6 24 29
7 17 20
8 21 22
a. State the Null and the Alternative Hypotheses.
b....
4. Suppose a sample of 8 students were given a diagnostic test before studying a particular module...
4. Suppose
a sample of 8 students were given a diagnostic test before studying
a particular module and then again after completing the module. We
want to find out if, in general, our teaching leads to improvements
in students’ knowledge/skills (i.e. test
scores). (2,4,4)
Student Pre-Module
Score Post-Module
Score
1 16 17
2 21 25
3 16 15
4 22 24
5 19 16
6 24 29
7 17 20
8 21 22
a.
State the Null and the Alternative Hypotheses. (2)
b.
Gather the differences and show the test statistics and the find
the standardized test statistic. (4)...
The data below shows the pre and post test scores of a random sample of students...
The data below shows the pre and post test scores of a random
sample of students who
took part in a memory enhancement seminar. The data records the
number of items
correctly recalled from a list of nonsense syllables and the
differences in the scores (D)
Pretest Post test D
Alice 5 10 -5
Bert 8 16 -8
Charlie 6 10 -4
David 10 20 -10
Emma 12 20 -8
If you wanted to determine if the seminar works to...
1) Twenty consumers tested both products X and Y. Their preferences are listed below. Test the...
1) Twenty consumers tested both products X and Y. Their
preferences are listed below. Test the following H0:
Consumers prefer brand Y. Use the sign test.
Consumer J
Brand Preference
Consumer J
Brand Preference
1
Y
11
Y
2
Y
12
Y
3
X
13
Y
4
Y
14
Y
5
Y
15
X
6
Y
16
X
7
X
17
Y
8
Y
18
Y
9
X
19
Y
10
Y
20
Y
Calculated test statistic:
Critical value of...
While teaching a unit on fractions, a fifth-grade teacher does a pre-test at the beginning of...
While teaching a unit on fractions, a fifth-grade teacher does a
pre-test at the beginning of the unit and a post test and the end
of the unit. She found the difference of each student's scores
(post-test - pre-test) and then finds the mean. There are 21
students in her class. The mean of the differences is 7 points,
with a standard deviation of 3 points. The teacher wants to know if
the post-test scores are different than the pre-test...
A sample of freshmen takes a reading comprehension test and their scores are summarized below. If...
A sample of freshmen takes a reading comprehension test and
their scores are summarized below. If the mean for the general
population on this test is μ = 12, can you conclude that this
sample is significantly different from the population. Test with α
= .05. Include an effect size measure you find appropriate and
explain why you chose what you calculated - you determine the tail
and why. (up to 8 points)
Sample Scores: 16, 8, 8, 6, 9,...
ADVERTISEMENT
Need Online Homework Help?
Get Answers For Free
Most questions answered within 1 hours.
ADVERTISEMENT
Active Questions
asked 13 minutes ago
asked 13 minutes ago
asked 17 minutes ago
asked 19 minutes ago
asked 45 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