Question
In: Math
Two groups of students are selected to test different learning techniques. The test scores of group...
Two groups of students are selected to test different learning techniques. The test scores of group 1 were: 95, 73, 68, 95, 98, 79, 98, 86, 76, 89, 89, 94. The test scores of group 2 were: 100, 80, 95, 90, 95, 98, 100, 100. Can it be said with 95% confidence that one group outperformed the other?
Solutions
milcah answered 2 months agoRelated Solutions
In a test given to two groups of students to marks were as follows: First group:...
In a test given to two groups of students to marks were as
follows:
First group: 9, 11, 13, 11, 15, 9, 12, 14
Second group: 10, 12, 10, 14, 9, 8, 10
Examine the significance of difference
μ1-μ2 under the
assumption on the samples are drawn from normal population with
σ12=σ22.
Suppose we are comparing average scores on a test for two groups that used different study...
Suppose we are comparing average scores on a test for two groups
that used different study techniques. The null hypothesis is that
μ1 - μ2 = 0 A. If μ1 = 84 and μ2 = 80, which of the following are
true (select all that apply)?
If we fail to reject H0, we are making the correct decision
If we fail to reject H0, we are committing a Type I error
If we fail to reject H0, we are committing...
Two different teaching procedures were used on two different groups of students. Each group contained 100...
Two different teaching procedures were used on two different
groups of students. Each group contained 100 students of about the
same ability. At the end of the term, an evaluating team assigned a
letter grade to each student. The results were tabulated as
follows:
Grade Group
A B C D F Total
Total (I) 15 22 32 17 14 100
(II) 9 16 29 28 18 100
If we consider this data to be comprised of independent
observations, test at...
From a random sample of 77 students in an introductory finance class that uses group-learning techniques,...
From a random sample of
77
students in an introductory finance class that uses
group-learning techniques, the mean examination score was found to
be
76.3476.34
and the sample standard deviation was
2.32.3.
For an independent random sample of
88
students in another introductory finance class that does not
use group-learning techniques, the sample mean and standard
deviation of exam scores were
70.7270.72
and
8.88.8,
respectively. Estimate with
9090%
confidence the difference between the two population mean
scores; do not assume...
From a random sample of 77 students in an introductory finance class that uses group-learning techniques,...
From a random sample of 77 students in an introductory finance
class that uses group-learning techniques, the mean examination
score was found to be 76.9376.93 and the sample standard deviation
was 2.52.5. For an independent random sample of 88 students in
another introductory finance class that does not use
group-learning techniques, the sample mean and standard deviation
of exam scores were 70.8870.88 and 8.58.5, respectively. Estimate
with 9999% confidence the difference between the two population
mean scores; do not assume...
The paired data below consist of the test scores of 6 randomly selected students and the...
The paired data below consist of the test scores of 6 randomly
selected students and the number of hours they studied for the
test. Test the claim that there is a linear correlation between
hours of study and test scores, with 0.03 significance level and
P-Value method.
Hours 6 7 5 9 4 10
Score 71 82 58 85 62 91
The table below shows the scores of a group of students on a 10-point quiz. Test...
The table below shows the scores of a group of students on a
10-point quiz.
Test ScoreFrequency
3 4
4 3
5 3
6 2
7 1
8 1
9 1
10 6
The mean score on this test is:
The median score on this test is
Two groups were selected for an experiment. The sample data is reported: Group A Group B...
Two groups were selected for an experiment. The sample data is
reported:
Group A Group B
Sample Mean Spending/day ($) 170 150
Sample Standard deviation ($) 10 5
# of Females 9 7
Sample Size 36 42
a. Set up a 99% confidence interval for the mean difference in
spending between the two groups.
b. At the 10% level test the alternate hypothesis that group B
has lower spending level than Group A.
Three independent group students took an exam. The data presented below represent the students’ test scores....
Three independent group students took an exam. The data
presented below represent the students’ test scores.
Group 1 Group 2 Group 3
95 79 65
98 76 68
80 60 70
77 88 87
99 69 66
90 66 72
Based on the post hoc (Tukey) test, which two groups have a
significant difference at the 0.05 level ?
a. group 1 and group 2
b. group 1 and group 3
c. group 2 and group 3
d. both a...
30 students were randomly selected from a large group of students taking a certain test. The...
30 students were randomly selected from a large group of
students taking a certain test. The mean score for the students in
the sample was 86.
Assume that σ = 11.1. Construct a 99% confidence interval for the
mean score, μ, of all students
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