Question

Validity refers to measuring something as an accurate reflection of what was intended to be measured.

True

False

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A variable whose attributes are different, but cannot be ordered in any way.

		nominal
		ordinal
		interval
		ratio -- The number of times a person has been arrested defined as any number from zero to infinity is an example of a nominal level measurement. True False

Answer 1

1. Validity refers to measuring something as an accurate reflection of what was intended to be measured. Ans. True It gives the extent to which a measure adequately represents the underlying phenomena that it is supposed to measure.A test is valid if it measures what it claims to measure.

2.A variable whose attributes are different, but cannot be ordered in any way. Ans.Nominal Attributes are nothing but characterestics, and here, given that they are distinct and not ordinal;The scale used to measure such categories is nominal scale.An example of nominal variable would be Gender, with categories: Male and Female

3.The number of times a person has been arrested defined as any number from zero to infinity is an example of a nominal level measurement. Ans. False Here, the data is in the form of counts, hence is a numerical (continuous variable).And has a well defined 'zero' implying no person arrested.Hence it is an example of a ratio level measurement.