State the Independent Variable and the Dependent Variables - Statistics Assignment Help

Assignment Task:

TASK:

Question 1: Refer to the bodyfat.sav file for the dataset. A researcher wanted to inspect the association between the amount of body fat and (1) the triceps skinfold thickness and (2) thigh circumference. He selected 20 females randomly whose age are between 25 and 30 years old.

a. State the independent variable and the dependent variables. (3 marks)

b. i. Test the association between the amount of body fat and the triceps skinfold thickness.

ii. Test the association between the amount of body fat and the thigh circumference. (10 marks)

c. Test the relationship between the amount of body fat and

(i) the triceps skinfold thickness and

(ii) the thigh circumference. (10 marks)

d. Draw a conclusion based on your results and interpretation. (2 marks) 

Question 2: In the garden peas, yellow cotyledon color is dominant to green, and inflated pod shape is dominant to the constricted form. Considering both of these traits jointly in self-fertilized dihybrids, the progeny appeared in the following numbers: 193 green, inflated 184 yellow constricted 556 yellow, inflated 61 green, constricted Test whether genes encoded for color and pod shape are assorted independently according to a 9:3:3:1 ratio. a. Suggest a statistical test. (1 mark)

b. Identify hypothesis null and alternate. (2 marks) c. Perform the statistical analysis in “a” and test your hypothesis in “b”. (5 marks) d. Draw a conclusion based on your results and interpretation. (1 mark) 

Question 3: A laboratory manager wants to keep sick leave as low as possible by keeping employees healthy through disease prevention program. Many employees have contracted pneumonia leading to productivity problems due to sick leave from the disease. There is a vaccine for pneumococcal pneumonia, and he believes that it is important to get as many employees vaccinated as possible. Due to a production problem at the company that produces the vaccine, there is only enough vaccine for half the employees. In effect, there are two groups; (1) employees who received the vaccine and (2) employees who did not receive the vaccine. The company sent a nurse to every employee who contracted pneumonia to provide home health care and to take a sputum sample for culture to determine the causative agent. They kept track of the number of employees who contracted pneumonia and which type of pneumonia each had. The data were organized as follows: Group 1: Not provided with the vaccine (unvaccinated control group, N = 92)

Group 2: Provided with the vaccine (vaccinated experimental group, N = 92) There are 3 health outcomes:

(1) contracted pneumococcal pneumonia;

(2) contracted another type of pneumonia; and

(3) did not contract pneumonia.

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