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AP Psychology Videos 135 videos

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AP Psychology 3.3 Research Methods 5 Views


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AP Psychology 3.3 Research Methods. What is the mode of this distribution?

Language:
English Language

Transcript

00:00

here's your shmoop du jour brought to you by heavy metals. our

00:07

band plutonium would be a great guitarist but it just wasn't in its [band plays on a stage]

00:11

element .and here's our question. what's the mode of this distribution? and Eric

00:17

[mumbling ] all we really need to know

00:23

is exactly what a mode is. it's pretty simple. really amote as a measure of

00:27

central tendency kind of them like one of those cool indie bands that we always

00:32

pretend to know about. all right well for the sake of keeping modes interesting

00:36

let's follow our newly established heavy metal band central tendency. now measures

00:42

of central tendency also include mean and median and all three of them

00:46

represent the most difficult scores in a data set. some heavy stuff. now mean it's [the number 3 sings into a mic]

00:52

just another word for average. to find the mean you add small of the values

00:56

together then divide by the number of values in the set. look we're starting to

01:00

get why they're heavy metal since how else will be audience? alright well in

01:04

this case adding all the numbers up gives us 389 .and since there's 10

01:08

numbers total we divide by 10 which gives us 38.9. that happens to be C but

01:14

since we're looking for the mode not the mean we can get rid of this one. medium

01:18

meanwhile is the middle number of a set of numbers when you place them in

01:22

numerical order. if we had an odd number of numbers it would be simply the middle

01:26

number. if we have an even number of numbers and like here you'll find the

01:30

meaning of the two median numbers to get the true median. thankfully for us our

01:35

two median numbers on the same 36 plus 36 divided by 2.in California is 36. which [set of numbers listed]

01:41

happens to be answered be that means we can rule it out right? well since our

01:45

geeky but lovable metal band doesn't want us to eliminate b just yet we'll

01:48

keep it into running. looks like it's time for our main act. mode just found

01:52

quite easily it's the most commonly occurring number within a

01:55

data. so if we take another look at our numbers we can see quite clearly that

01:59

well what do you know 36 is the only number that appears twice. not only are

02:04

our mode and median the same but our band was right b 36 is the answer we [numbers 36 and 36 highlighted]

02:10

were looking for. our man.

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