Tablet PC Comparison provides a wide variety of information about tablet computers. The company's 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 $10$ tablet computers is shown.$$

Product Information for $10$ Tablet Computers

Tablet Cost

$($$$)$ Operating

System Display Size

$($inches$)$ Battery Life

$($hours$)$ CPU

Manufacturer

Acer Iconia W$510599$ Windows $10\mathrm{.}18\mathrm{.}5$ Intel

Amazon Kindle Fire HD $299$ Android $8\mathrm{.}99$ TI OMAP

Apple iPad $4499$ iOS $9\mathrm{.}711$ Apple

HP Envy X$2860$ Windows $11\mathrm{.}68$ Intel

Lenovo ThinkPad Tablet $668$ Windows $10\mathrm{.}110\mathrm{.}5$ Intel

Microsoft Surface Pro $899$ Windows $10\mathrm{.}64$ Intel

Motorola Droid XYboard $530$ Android $10\mathrm{.}19$ TI OMAP

Samsung Ativ Smart PC $590$ Windows $11\mathrm{.}67$ Intel

Samsung Galaxy Tab $525$ Android $10\mathrm{.}110$ Nvidia

Sony Tablet S $360$ Android $9\mathrm{.}48$ Nvidia

$($a$)$

How many elements are in this data set?

$($b$)$

How many variables are in this data set?

$($c$)$

Which variables are categorical? $($Select all that apply.$)$

cost

operating system

display size

battery life

cpu manuafacturer

Which variables are quantitative? $($Select all that apply.$)$

cost

operating system

display size

battery life

cpu manuafacturer

$($d$)$

What type of measurement scale is used for cost?

nominal scale

ordinal scale

interval scale