Tablet PC Comparison provides a wide variety of information about tablet computers. Their website enables consumers to easily compare different tablets using factors such as cost, type of operating system, display size, battery life, and CPU manufacturer. A sample of 7 tablet computers is shown in the table below (Tablet PC Comparison website).

Tablet	Cost ($)	Operating System	Display Size (inches)	Battery Life (hours)	CPU Manufacturer
Apple iPad 4	499	iOS	9.7	11	Apple
HP Envy X2	860	Windows	11.6	8	Intel
Lenovo ThinkPad Tablet	668	Windows	10.1	10.5	Intel
Motorola Droid XYboard	530	Android	10.1	9	TI OMAP
Samsung Ativ Smart PC	590	Windows	11.6	7	Intel
Samsung Galaxy Tab	525	Android	10.1	10	Nvidia
Sony Tablet S	360	Android	9.4	8	Nvidia

a. How many elements are in this data set?

b. How many variables are in this data set?

c. Which variables are categorical and which variables are quantitative?

Variable	Categorical/Quantitative
Cost ($)	SelectCategoricalQuantitativeItem 3
Operating System	SelectCategoricalQuantitativeItem 4
Display Size (inches)	SelectCategoricalQuantitativeItem 5
Battery Life (hours)	SelectCategoricalQuantitativeItem 6
CPU Manufacturer	SelectCategoricalQuantitativeItem 7

d. What type of measurement scale is used for each of the variables?

Variable	Measurement Scale
Cost ($)	SelectOrdinalRatioNominalItem 8
Operating System	SelectOrdinalRatioNominalItem 9
Display Size (inches)	SelectOrdinalRatioNominalItem 10
Battery Life (hours)	SelectOrdinalRatioNominalItem 11
CPU Manufacturer	SelectOrdinalRatioNominal