1) which variables in the table, if any, were measured on a nominal scale? selec

ID: 73270 • Letter: 1

Question

1) which variables in the table, if any, were measured on a nominal scale? select all that apply

a) gender b)age c)race/ethnicity d)smoking status e)BMI

2) which variables in the table, if any, were measured on a ordinal scale?

a) gender b)age c)race/ethnicity d)smoking status e)BMI

3) which variables in the table, if any, were measured on a interval scale?

a) gender b)age c)race/ethnicity d)smoking status e)none

4) which variables in the table, if any, were measured on a ratio scale? select all that apply

a) gender b)age c)race/ethnicity d)smoking status e)BMI

5) which measure(s) of variability, if any, is(are) presented in this table? select all that apply

a)bivariate statistics b)ranges c)standard deviation d) correlation

TRUE OR FALSE

1) measurement may be defined as the assignment of numbers to characterstics of objects or people according to specified rules.

2) reliability refers to the extent to which an instrument measures the concept that the researcher thinks is being measured.

3)a reliable measure is one that minimizes the error component of an obtained score.

4) a likert scale can usually be made more reliable by deleting some of the items.

5) a heteregenous sample generally produces a higher reliability cofficient than a more homogeneous sample.

6) a coeffcient alpha of .93 on a new scale would provide evidence that the scale is internally consistent.

7)the aspect of reliability most likely to be assessed with observational ratings is stability.

8) efforts to assess construct validity are often on hypothesis testing.

9) specificity refers to the ability of a screening instrument to correctly identify non-cases.

1. For nominal - Gender / ethnicity [ because there are options to select in gender like male or female]

2. For ordianal - smoking status [ because we can tell variations in the smokers types, eg- chain smokers, frequently, non-smoker, etc]

3. BMI [ it can measured from an instrument]

4. Ratio = age.

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