You have a theory that the person paying the bill in a restaurant (host) orders

Question

You have a theory that the person paying the bill in a restaurant (host) orders a less expensive meal than does his/her guest. Further, you suspect that the effect may be greater for male hosts than for female hosts.

INSTRUCTIONS:

Each of the following is a description of a health-related study. In the table are spaces to answer each of the following questions about each study.

What is/are the independent variable(s)?

Is (are) the independent variable(s) nominal, ordinal, interval, or ratio?

What is the dependent variable?

Is the dependent variable nominal, ordinal, interval, or ratio?

What is the alternative hypothesis?

What is the null hypothesis?

How many treatments (levels) are there in each independent variable?

To what population does your conclusion apply?

Therapist Doe wants to determine if a newly developed meditation course improves student GPAs. His sample consists of 60 students who have recently entered an undergraduate program; 30 of them took the meditation course prior to the beginning of the semester, 30 did not. Dr. Doe has access to each subject's GPA.

a. IV(s):  

b. IV(s) nominal, ordinal, interval or ratio?

c. DV(s):  

d. DV(s) nominal, ordinal, interval or ratio?

e. Alt H:  

f. null H:  

g. how many levels in IV(s)

h. population:

a. IV(s):  

b. IV(s) nominal, ordinal, interval or ratio?

c. DV(s):  

d. DV(s) nominal, ordinal, interval or ratio?

e. Alt H:  

f. null H:  

g. how many levels in IV(s)

h. population:

Explanation / Answer

a) independent variable: student GPAs when they not took the meditation course prior to the beginning of the semester.

b) Ratio

c) student GPAs after complete the course who took the meditation course

d) Ratio

e) H1: There is significance difference between the GPAs of the before and after course of meditation course

f): H0: There is no significance difference between the GPAs of the before and after course of meditation course

g) only one level

h) Popualation: all undergraduate students

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