Question
In: Statistics and Probability
A researcher tests whether 4 treatments for depression are different, and gets a significant value for...
A researcher tests whether 4 treatments for depression are different, and gets a significant value for F. What can the researcher conclude about differences between groups? What can the researcher not conclude about differences between groups?
Solutions
Expert Solution
A researcher tests whether 4 treatments for depression are different, and gets a significant value for F. What can the researcher conclude about differences between groups? What can the researcher not conclude about differences between groups?
Solution:
Null Hypothesis(H0) : there is not significant difference between 4 (treatments for depression) groups. All the four group means are same .
Alternative Hypothesis(H1) : there is significant difference between 4 (treatments for depression) groups. Atleast two group means are significantly different.
If researcher gets a significant value for F .
It means Calculated value of F is greater than Critical value of F.
So , researcher can reject the Null Hypothesis (H0) that there is not significant difference between 4 (treatments for depression) groups.
And researcher conclude that there is significant difference between 4 (treatments for depression) groups.
Researcher cannot conclude that there is not significant difference between 4 (treatments for depression) groups.
orchestra answered 2 years agoRelated Solutions
A psychologist wants to see how effective 3 different treatments are on depression. One group gets...
A psychologist wants to see how effective 3 different treatments
are on depression. One group gets medication only, one group only
gets counseling, and one group only receives a diet supplement.
Depression scores after the treatments are listed below:
Medication
Counseling
Diet Supplement
23
38
40
16
32
28
15
29
33
32
42
42
26
25
35
Use the .05 level of significance, state your research question,
critical value, include your ANOVA Source Table and calculations,
and state whether...
A researcher is interested in evaluating two different treatments developed to treat depression. Test her hypothesis...
A researcher is interested in evaluating two different
treatments developed to treat depression. Test her hypothesis that
the treatments lead to different results. Her data are below (a
higher value indicates higher depression). YOU NEED TO CALCULATE
THE MEANS AND THE STANDARD DEVIATIONS FOR YOUR DATA.
Relaxation Meditation
24 32
22 32
31 27
27 23
23 38
34 34
28 23
Formulate the hypotheses.
Determine the critical value(s).
Calculate the test statistic.
Calculate and evaluate Cohen’s d and r2....
A researcher tests whether the political affliction of individuals is related to or independent of whether...
A researcher tests whether the political affliction of
individuals is related to or independent of whether they have
positive views of the economy. The researcher records the political
affiliations and economic viewpoints of 105 participants.
(Affiliation: 1 = Democrat, 0 = Republican, Economy: 1 = Positive,
0 = Negative). Data: Affiliation: Democrat = 67, feel Economy is
positive = 35, negative = 32. Affiliation: Republican = 20, feel
Economy is positive = 20, negative = 18.
Assume that a researcher is interested in testing whether there is a significant effect of video...
Assume that a researcher is interested in testing whether there
is a significant effect of video game playing on teenagers’
visual-spatial abilities. The researcher randomly selects 4
participants and measures their visual-spatial cognition before and
after playing video games for 4 hours a day for a week.*SHOW WORK
FOR THIS PROBLEM.
a. Use the data in the table below to conduct the appropriate
statistical test including all of the necessary steps. Assume α =
.10.
Participant
Xbefore
Xafter
A
85...
A researcher wishes to determine whether there is a significant relationship between the gender of psychology...
A researcher wishes to determine whether there is a significant
relationship between the gender of psychology students and the
refreshment drink they prefer. The results obtained from a survey
of students are presented in the following table: Preferred Drink
Gender Water Coffee Soda Total Male 46 29 40 115 Female 29 36 70
135 Total 75 65 110 250.
Perform an appropriate two-tailed hypothesis test at α = 0.05.
If a significant result is obtained, determine the strength of the...
A researcher conducts an experiment to compare the effectiveness of different therapies for depression. Participants diagnosed...
A researcher conducts an experiment to compare the effectiveness
of different therapies for depression. Participants diagnosed with
depression are randomly assigned to one of four groups: Control (no
therapy provided), antidepressant medication (SSRI),
cognitive-behavioral therapy (CBT), or a combination of medication
and cognitive-behavioral therapy (SSRI+CBT). The DV is depression
severity after 4 weeks, with higher scores indicating the presence
of more depressive symptoms.
SSRI
CBT
SSRI+CBT
Control
11
7
9
12
5
9
6
7
9
6
7
11
7...
A researcher wanted to test the effectiveness of three different doses of medication on depression levels,...
A researcher wanted to test the effectiveness of three different
doses of medication on depression levels, so she recruited 60
people and split them evenly into the 3 groups. Below an ANOVA
summary table from his hypothetical experiment. Use this table
to answer questions below.
Source
SS
df
MS
F
Between
(A)
(C)
(F)
3.50
Within
570
(D)
(G)
Total
(B)
(E)
Using the information in the table (be sure to fill in, see
other ANOVA table based essay question),...
A researcher would like to know whether there is a significant relationship between Verbal skills and...
A researcher would like to know whether there is a significant
relationship between Verbal skills and Math skills in population of
high school students. A sample of n = 200 students is
randomly selected and each student is given a standardized Verbal
skills test and a standardized Math skills test.
Based on the test results, students are classified as High or
Low in Verbal skills and Math skills.
The results are summarized in the following frequency
distribution table (i.e., the...
In a cognitive psychology experiment, the researcher is interested in whether encoding condition has a significant...
In a cognitive psychology experiment, the researcher is
interested in whether encoding condition has a significant effect
on memory for a list of words. She recruits 32 subjects to
participate in the experiment. Each recruited subject is randomly
assigned to either encoding condition A or encoding condition B.
The researcher would like to leave the hypothesis non-directional
without predicting which encoding condition would lead to better
memory, and she sets the significance level at α = .05 for a
two-tailed...
A researcher would like to know whether there is a significant relationship between Verbal skills and...
A researcher would like to know whether there is a significant
relationship between Verbal skills and Math skills in population of
high school students. A sample of n = 200 students is
randomly selected and each student is given a standardized Verbal
skills test and a standardized Math skills test.
Based on the test results, students are classified as High or
Low in Verbal skills and Math skills.
The results are summarized in the following frequency
distribution table (i.e., the...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- The equivalent synchronous impedance of a 25kVA, 400V three-phase Y-connected synchronous generator is 0.05 + j1.6...
- You have $100,000 to invest in either Stock D, Stock F, or a risk-free asset. You...
- In two or three sentences, explain how you have seen the concept of grit work in...
- You have invested 30 percent of your portfolio in Jacob, Inc., 40 percent is Bella Co.,...
- Parallel Arrays This question is in MindTap Cengage Summary In this lab, you use what you...
- 5. You have invested 30 percent of your portfolio in Jacob, Inc., 40 percent is Bella...
- JAVA Write a test program that prompts the user to enter a series of integers and...
ADVERTISEMENT