The information given is the actual case study. Here is the chart that was given
ID: 3228249 • Letter: T
Question
The information given is the actual case study. Here is the chart that was given as well
ANOVA table
Source
df
SS
MS
F
p
Dosage
3
557.6146
185.8715
5.1785
0.0028
Subjects
23
9065.4896
394.1517
Error
69
2467.6354
35.8933
Total
95
12099.7396
Treatment Effects of a Drug on Cognitive Functioning in Children with Mental Retardation and ADHD.
Here are also questions that go along with the case study.
Hypotheses: List the statistical notation and written explanations for the null and alternative hypotheses for the study. Variables: Describe the independent and dependent variables, their levels, operational definitions, and characteristics (e.g., scale of measurement). Data Analysis: You are given the following information from the ANOVA conducted. Summarize the specific type of statistical test conducted, the results obtained, and conclusions regarding the hypotheses (e.g, can we reject at the .05 or .01 level?). Be sure to describe why this specific ANOVA was selected and if a post-hoc test should be conducted. Critique: Critique the results of the study, paying specific attention to the appropriateness of the analyses conducted, any biases or assumptions that were made, practical significance of the results, and recommendations for improving upon the study (methods or analyses).
Source
df
SS
MS
F
p
Dosage
3
557.6146
185.8715
5.1785
0.0028
Subjects
23
9065.4896
394.1517
Error
69
2467.6354
35.8933
Total
95
12099.7396
Explanation / Answer
The hypothesis are as follows;
Null Hypothesis: The different types of doses and subjects have no impact on the cognitive functioning of the children with mental retardation & ADHD.
Alternate Hypothesis: The different types of doses and subjects have an impact on the cognitive functioning of the children with mental retardation & ADHD.
.
The dependent and independent variables are as follows:
Dependent variables: Cognitive functioning of children with mental retardation & ADHD
Independent variables: 4 different types of doses and 23 subjects
.
From the ANOVA table we get to know that the Test Statistic F = 5.1785 & the P value =0.0028
Thus at the significance level 0.05, we reject the null hypothesis
Because: P value 0.0028 < alpha 0.05, thus we reject the null
.
Conclusion: The we conclude that different types of doses and different subjects have different conginitive functioning in children with mental retardation & ADHD
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