Question

¤Nominal ¤Is THIS different than THAT?

¤Ordinal ¤Is THIS bigger than THAT?

¤Interval ¤What are the QUANTITATIVE differences?

¤Ratio ¤How many time bigger is THIS from THAT?

Provide three health care-focused examples of each type of variable: Nominal, Ordinal, Interval, Ratio.

Answer 1

Nominal : Nominal comes from the name,The variables measured on the nominal scales. There is no measure of distance between the values. These are characterized by the variables that are noncontinuous and discrete.

Example

• sex: Male, female
• Marital status: Married , unmarried
• Blood group:A, B, AB, O
• Genotype : Bb,bb,BB,bB
• pregnancy status : pregnant not pregnant
• health state : sick,well

Ordinal :These are measurement that are classified by variables that are assessed incrementally. You can have higher and lower amounts, less than and greater than terms with ordinal variables

Example :

• Rank the stage of cancer : Higher , lower
• pain status: slight moderate, intense
• exercise status:often, sometimes, never

Interval :It has the property that differ in the number represents the real difference in the variable, This variable is characterized by the scale that is quantitative in nature. Increment in the scale is measurable and also it is equidistant. Temperature measure in terms of number of degrees.

Examples:

• Celsius Temperature.
• Fahrenheit Temperature.
• IQ (intelligence scale).

Ratio :It has all the properties of interval variable and addition real absolute zero. That means the value of zero indicates the total absence of variable being measured.

Examples:

• Time measured in seconds, minutes, hour
• blood pressure measured in millimeters of mercury
• age
• weight
• height