Question
In: Math
1. An instructor would like to examine the effect of using handouts during lecture on student’s...
1. An instructor would like to examine the effect of using handouts during lecture on student’s grades. Usually no handouts are used and the mean final grade in the class is μ = 80. This semester, the instructor uses handouts during lecture and the mean final grade in the class of n = 41 students is M = 82.5 with a standard deviation of s = 6.
a. Is there sufficient evidence to conclude that handouts significantly (α = .01) change overall grades? If so, compute the effect size (r2) and explain what it tells you about the differences in grades due to handouts.
1.
2.
3.
4.
b. Is there sufficient evidence to conclude that handouts significantly (α = .01) improve overall grades? (Hint: Step 3 will be the same as part a.)? If so, compute the effect size (r2) and explain what it tells you about the differences in grades due to handouts.
1.
2.
3.
4.
Solutions
Expert Solution
(a)
Conclusion: There is not sufficient evidence to conclude that handouts significantly (α = .01) change overall grades.
(B)
Conclusion : There is sufficient evidence to conclude that handouts significantly (α = .01) improve overall grades.
The effect size will be:
milcah answered 8 months agoRelated Solutions
1. A statistics instructor at a Sultan aboos University would like to examine the relationship between...
1. A statistics instructor at a Sultan aboos
University would like to examine the relationship between the
number of optional homework problems students do during the
semester and their course score. She randomly selects 10 students
for study and asks them to keep track of the number of these
problems completed during the course of the semester.
Course Score (x)
No. of Problem (y)
15.2
225
17.4
335
12.9
195
16.2
342
19.5
416
23.1
532
20.4
422
26.1
624...
A researcher would like to examine the effect of labor unions on the average pay of...
A researcher would like to examine the effect of labor unions on
the average pay of workers. The investigator obtains information
from the National Carpenters Union, which states that the average
pay for union carpenters is μ=$7.80 per hour. The researcher then
obtains a random sample of 8 carpenters who do not belong to a
union and records the pay for each. The data from this sample are
as follows: 6.25, 7.50, 6.75, 6.90, 7.10, 7.15, 8.00, 6.15 per
hour....
Using the Instructor ranking data conduct a simple linear regression to predict a student’s scores based...
Using the Instructor ranking data conduct a simple linear
regression to predict a student’s scores based on the number of
hours the student studies and answer the following questions:
What is the value of the intercept of this regression
equation?
What is the value of the slope of this regression equation and
what is its interpretation within the context of this problem?
Write the equation for this logistic regression model
R2 = What does this number
mean?
F= Explain how F (F...
1. ) An instructor believes that students do not retain as much information from a lecture...
1. ) An instructor believes that students do not retain as much
information from a lecture on a Friday compared to a Monday. To
test this belief, the instructor teaches a small sample of college
students some preselected material from a single topic on
statistics on a Friday and on a Monday. All students received a
test on the material. The differences in exam scores for material
taught on Friday minus Monday are listed in the following
table.
Difference
Scores...
1. What would the Ns curve look like if the substitution effect = income effect? Explain...
1. What would the Ns curve look like if the substitution effect
= income effect? Explain your answer.
2. Derive the Ys curve in the classical model.
3.. Derive the Yd curve in the classical model.
An instructor would like to know about the difference in test averages between the first and...
An instructor would like to know about the difference in test
averages between the first and second exams of the school year. To
that end, we sample 100 of each test and find Test 1 has sample
average 85 and Test 2 has sample average 79. From past experience
we know Test 1 grades have a standard deviation of 3 and Test 2
grades have a standard deviation for 4.If μ1 is the population mean
for Test 1 and μ2...
a psychologist would like to examine the effects of a new drug on the activity level...
a psychologist would like to examine the effects of a new drug
on the activity level of animals. Three samples of rats are
selected with n=5 in each sample. The rats in the first sample
serve as a control and do not get any of the drug. The rats in the
second group receive a small dose, and the rats in the third group
get a large dose of the drug. The psychologist records the activity
level for each animal....
A psychologist would like to examine the effects of sugar consumption on the activity level of...
A psychologist would like to examine the effects of sugar
consumption on the activity level of preschool children. Three
samples of children are selected with n = 5 in each sample. One
group gets no sugar, one group gets a small dose, and the third
group gets a large dose. The psychologist records the activity
level for each child. The data from this experiment are presented
below. Use SPSS to analyze the data and answer the
following question...
a. Does...
A researcher would like to examine if there are differences in level of daily stress reported...
A researcher would like to examine if there are differences in
level of daily stress reported by different groups of
professionals. He intends to compare an average level of daily
stress reported by three samples of professionals: lawyersmedical
doctors and managers. This study is an example of?
A psychologist would like to examine the effects of sugar consumption on the activity level of...
A psychologist would like to examine the effects of sugar
consumption on the activity level of preschool children. Three
samples of children are selected with n = 5 in each sample. One
group gets no sugar, one group gets a small dose, and the third
group gets a large dose. The psychologist records the activity
level for each child. The data from this experiment are presented
below. a. Clearly state the findings of your analysis. Report
p-value. b. Compute η2...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Case Study: Personal Beliefs in the Workplace Don Shakow was a prominent professional who worked in...
- 1: Competency framework usage is the modern best practice in management. What is meant by competency...
- A 19.34 g mixture of sugar (C12H22O11) and table salt (NaCl) is dissolved in 231 g...
- Young and Company claims that its pressurized diving bell will, on average, maintain its integrity to...
- 1) Alternative compiled code sequence using instructions in classes A, B, C. What is the average...
- An asset is purchased on January 1 for $48,700. It is expected to have a useful...
- Do we have any online or offline tool to convert c and cpp programs into MIPS...
ADVERTISEMENT