Indicate which of the following variables are quantitative...

Indicate which of the following variables are quantitative and which are qualitative. If the variable is quantitative, identify whether it is discrete or continuous. 1. Number of persons in a family 2. Color of a car 3. Time to commute from home to work 4. Marital status of a person 5. Number of errors in a person's credit report 6. The amount of time a student spent studying for a test 7. A person's blood type 8. The weight of a baby 9. The amount of gasoline put into a car at a gas station

Transcript

00:01 We have a series of variables.

00:02 Are they quantitative? quantitative or are they qualitative? if they are quantitative, are they discrete or continuous? okay, so first what does it mean to be quanta or quala? qualer comes from quality.

00:19 It's a characteristic.

00:21 Quanta means quantity.

00:26 It's numerical.

00:28 So these are describing a characteristic like colour or a name.

00:31 Quantity means it's a number, like height or weight.

00:39 So our first one are a number of people in a family.

00:42 So that's a number.

00:43 So that's a quantity.

00:45 So i'll just say quantum.

00:47 Is it discrete or continuous? so a discrete value is one where you have a fixed set of values it can take.

00:59 Fixed set of values.

01:03 And because of this, you tend to count it rather than measure it.

01:07 Continuous is a is the opposite.

01:11 Continuous can take any value within an interval and you have to measure it.

01:21 So a good way of testing if you're looking at continuous or discrete is to look for wiggle room.

01:27 So a number of people in the family.

01:29 Let's say you could have a family of three or four.

01:31 Can you go in between? can you have 3 .5? and if you say yes, can you then go between 3 and 3 .5? it's where room to keep going.

01:40 Because for a continuous data set, if you take any pieces of data and ask, could i have a value in between these? you would say yes.

01:48 Whereas discrete, you would hit a point where you'd say, no, you can't go between those.

01:54 So this is, of course, discrete.

01:56 A number of people in the family has to be a whole number...

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