Project #82671 - Descriptive statistics and ANOVA

 

Scenario 1:
A researcher wants to determine if different forms of regular exercise alter HDL levels in obese middle aged males between the ages of 35 and 45.  Participants in the study are randomly assigned to one of four exercise groups  No Exercise, Resistance Training, Aerobic Exercise or Stretching/Yoga – and instructed to follow the program for 8 weeks.  Their HDL levels are measured after 8 weeks and are summarized below.

 

Exercise Group

N

Mean

Std Dev

No exercise (TV watching 60 min/day)

40

45.1

9.8

Resistance Training 60min/day

40

51.2

10.2

Aerobic Exercise 60min/day

40

46.3

11.1

Stretching/Yoga

60min/day

40

47.1

12.5

 

1) What is the null hypothesis equation for this experiment?


2) Specify the νn numerator degrees of freedom? Please paste your data output file in the space below. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



3) Specify the νd denominator degrees of freedom?  



4) Identify the F-critical value at P<0.05 from the F distribution table 3-1 from the Primer of Biostatistics 7th Ed

 

5) Identify the F-critical value at P<0.01 from the F distribution table 3-1 from the Primer of Biostatistics 7th Ed


6) Specify whether you accept or reject the null hypothesis at P<0.05?



7) Specify whether you accept or reject the alternate hypothesis at P<0.05?




Scenario 2:
A researcher wants to determine if an experimental drug lowers Triglyceride levels (mg/dL) in individuals with elevated Triglycerides. (15pts)

n

Placebo

Standard Drug

Experimental drug

1

169

108

164

2

170

109

165

3

171

110

166

4

172

111

167

5

173

112

168

6

173

113

172

7

174

113

169

8

174

114

173

9

175

114

170

10

175

115

174

11

176

116

175

12

177

117

176

13

178

118

177

14

179

119

178

15

180

120

179

 

 

 

 

Table 1 

Please fill in the table

 

Placebo

Standard Drug

Experimental Drug

Mean

8)  
9)  
10)  

Standard Deviation 

11)  
12)  
13)  

Standard Error

14)  
15)  
16)  

Please paste your data output file in the space below.

 

 

17) What is the null hypothesis equation for this experiment?



18) What scale of measurement are Triglyceride levels (mg/dL)?
A) Nominal
B) Ordinal
C) Interval
D) Ratio

 

19) What is the F critical value at P<0.05



20) Specify whether you accept or reject the null hypothesis at P<0.05?

Subject Mathematics
Due By (Pacific Time) 09/19/2015 05:00 pm
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