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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?
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
Full Transcript
- 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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