1. An interval scale is preferable to an ordinal scale because Select one: a. it

Question

1. An interval scale is preferable to an ordinal scale because

Select one:

a. it allows the measurement of individual differences.

b. it rank orders individuals on some characteristic.

c. simpler statistics can be used.

d. sophisticated statistics can be used.

2. An operational definition refers to

Select one:

a. a measure of the reliability of a variable.

b. the only way of measuring a variable.

c. the specific method used to measure or manipulate a variable.

d. all of the above

3.

Any set of scores may be described by measures of ________ and ________.

Select one:

a. independent variables; dependent variables

b. probability; significance

c. chance variance; error variance

d. central tendency; variability

4. A researcher asks students to rate their feeling towards an increase in tuition on a 7-point scale ranging from “opposed” to “in favor of”. The researcher has used which type of measurement scale?

Select one:

a. interval

b. ratio

c. nominal

d. ordinal

Explanation / Answer

Interval scale vs ordinal scale:

A ordinal variable, is one where the order matters but not the difference between values. For example, you might ask patients to express the amount of pain they are feeling on a scale of 1 to 10. A score of 7 means more pain that a score of 5, and that is more than a score of 3. But the difference between the 7 and the 5 may not be the same as that between 5 and 3. The values simply express an order (graphpad). Thus an Ordinal refers to order in measurement. An ordinal scale indicates direction, in addition to providing nominal information. Low/Medium/High; or Faster/Slower are examples of ordinal levels of measurement.

A interval variable is a measurement where the difference between two values is meaningful. The difference between a temperature of 100 degrees and 90 degrees is the same difference as between 90 degrees and 80 degrees (graphpad). Based on the above explanation:

1.d. sophisticated statistics can be used is true

2. An operational definition refers to how we (the researcher) decide to measure our the variables in our study (variable = anything that can be measured). The only way to ensure consistent data collection, (pqsystems)

d. all of the above is the correct option

3. Any set of scores may be described by measures of central tendency and

variability

Measures of Central Tendency and Standard Deviation hence the option:

d. central tendency; variability is true

4. A researcher asks students to rate their feeling towards an increase in tuition on a 7-point scale ranging from “opposed” to “in favor of”. The researcher has used which type of measurement scale?

d. ordinal (true)

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