A researcher wants to determine if different forms of

Question

PBH592 Quiz: 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 ν_n numerator degrees of freedom? Please paste your data output file in the space below.

3) Specify the ν_d 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 7^th Ed.

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

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	1)	2)	3)
Standard Deviation	4)	5)	6)
Standard Error	7)	8)	9)
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?