SPSS LAP assignment

STAT 509 LAB 5 Assignment Name_______________________

Instructions:

1) Due Date

· May 21 @ 11:50pm

2) Assignment submission:

· When you submit an electronic file (assignment) you must use the following format: This is for: LAST NAME (in upper case), your first name, the course code, activity/assignment number and file format

· For example: SMITHJohn-STAT509-A1.doc

Assignment:

As has been mentioned before, the first step in any analysis of a data set is to look at a distribution of the variables of interest. One assumption of many statistical tests is that the shape of the distribution is relatively normal. If the distribution is not normal, a transformation may help to normalize it (we will not do this step in this class). Assume all the assumptions are met. Please use assignment# 5 dataset to answer the following questions:

1. Is the mean systolic blood pressure at week 6 different for people with different categories of BMI at week 6?

BMI at week 6	Description
< 25	Normal
25 - 29.999	Overweight
≥ 30	Obese

· What kind of variable is BMI in this case? _____________________________________

· What kind of variable is systolic blood pressure? ________________________________

· Hypothesis: H0: Ha:

	N	Mean	Std. Deviation	P-value (Sig.)
BMI categories	Normal
	Over weight
	Obese
Dependent variable: F ( , ) = , p-value =

· Decision:

Fail to reject the null hypothesis (FTR) Reject

· Interpretation:_________________________________________________________________________________________________________________________________________________________________________________________________________________________

_____________________________________________________________________________

Note: if the ANOVA test is significant, you have to run a Post Hoc Multiple Comparisons test (Tukey) and state your conclusion about which groups are different.

2. Does the mean systolic blood pressure at week 6 differ by marital status?

· What kind of variable is systolic blood pressure in this case? ________________________

· What kind of variable is marital status? _________________________________________

· Hypothesis: H0: Ha:

	N	Mean	Std. Deviation	P-value (Sig.)
Marital status	Single
	Married
	Other
Dependent variable: F ( , ) = , p-value =

· Decision:

Fail to reject the null hypothesis (FTR) Reject

· Interpretation:_________________________________________________________________________________________________________________________________________________________________________________________________________________________

_____________________________________________________________________________

Note: if the ANOVA test is significant, you have to run a Post Hoc Multiple Comparisons test (Tukey) and state your conclusion about which groups are different.