Please answer the question { choose a,b,c or d } have 4 question

9. Which ofthe following is an example of a variable measured at the ratio level of measurement?

A. Socioeconomic status measured as high, medium, and low

B. A person’s ethnicity

C. An index of depression with a potential range of 10 to 100

D. Military rank o Income in baht

10. What is the direction of association in the following hypothesis: education increases, ethnic as prejudice tends to decrease?

o Negative

o Positive to Ethnic prejudice

o Education

o Decrease

11. when researchers use multiple items to measure a single concept, they hope for high levels of consistent responses on these items. (High Cronbach’s Alpha) If they achieve this sort of interr consistence, they have achieved:

o Construct validity

o Criterion validity

o Inter-observer reliability

o Test-Retest reliability

o Content validity

12. As the size of the sample goes up,

o The fraction of the total population that a sample contains decreases o Its proportion to the size of the population must remain constant

o The confidence intervals of sample statistics increase

o Confidence in its representativeness of the population decreases

o Confidence in its representativeness of the population increases