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AP Psychology Videos 135 videos
AP Psychology 2.3 Testing and Individual Differences. Which factor below needs to be considered in the administration and evaluation of the attenti...
AP Psychology 2.4 Testing and Individual Differences. Which of these is an example of studies used in the nature vs. nurture debate of intelligence?
AP Psychology 1.2 Developmental Psychology. How would you respond to someone stating that babies are born without any real sense of the world aroun...
AP Psychology 3.1 Reseach Methods 7 Views
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Description:
AP Psychology 3.1 Reseach Methods. What is Ella's z-score?
Transcript
- 00:04
Here's your shmoop du jour brought to you by z-scores
- 00:07
their how a Frenchman tells you z-score of z-game okay here's our question.. Ella [Frenchman stood in front of Eiffel Tower]
- 00:12
receives a 92 on her algebra test the average score was 82 with a standard
- 00:17
deviation of 10 her z-score is what and here are the potential answers
- 00:23
Believe it or not a z-score does exist outside of the French [Frenchman and people playing sports in the background]
Full Transcript
- 00:28
sporting culture a z-score can be used when you want to standardize scores and
- 00:32
compare them to the average well they also allow you to determine how many
- 00:36
standard deviations each z-score is from the mean or central tendency and just as
- 00:42
a refresher because who doesn't like refreshments a standard deviation is a [Students eating refreshments]
- 00:46
measure used to quantify the amount of variation within a set of data in this
- 00:51
case how much variation there is between test scores okay now that we've
- 00:55
refreshed our brains and we're ready to go let's take a look at our question to
- 00:59
find a z-score you divide the difference of a data point and the mean by the [Man inspecting answer choices]
- 01:03
standard deviation so it'll look sort of like this all we
- 01:06
have to do now is fill in the equation our data point of interest is 92 and we
- 01:10
know our mean is 82 and our standard deviation is... sorry 10....
- 01:17
well a little mathematical magic and boom our answer is A - 1...Pretty cool [Magician uses wand and firework appears]
- 01:22
trick Mathemagician, wish we could have hired you when we were in school
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