Statistics for Psychology!. Refresher With a partner, define all of these terms: – Mean – Median...
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Transcript of Statistics for Psychology!. Refresher With a partner, define all of these terms: – Mean – Median...
![Page 1: Statistics for Psychology!. Refresher With a partner, define all of these terms: – Mean – Median – Mode – Population – Sample – Variable – Range Which.](https://reader036.fdocuments.net/reader036/viewer/2022083006/56649f335503460f94c4f4e5/html5/thumbnails/1.jpg)
Statistics for Psychology!
![Page 2: Statistics for Psychology!. Refresher With a partner, define all of these terms: – Mean – Median – Mode – Population – Sample – Variable – Range Which.](https://reader036.fdocuments.net/reader036/viewer/2022083006/56649f335503460f94c4f4e5/html5/thumbnails/2.jpg)
Refresher
• With a partner, define all of these terms:– Mean– Median– Mode– Population– Sample– Variable– Range
Which 3 are measures of central tendency???
![Page 3: Statistics for Psychology!. Refresher With a partner, define all of these terms: – Mean – Median – Mode – Population – Sample – Variable – Range Which.](https://reader036.fdocuments.net/reader036/viewer/2022083006/56649f335503460f94c4f4e5/html5/thumbnails/3.jpg)
Central Tendency
• Mean, mode, median• A measure of central tendency is a way of
specifying - central value.• Measures of central tendency are measures of
the location of the middle or the center of a distribution.
• The mean is the most commonly used measure of central tendency.
![Page 4: Statistics for Psychology!. Refresher With a partner, define all of these terms: – Mean – Median – Mode – Population – Sample – Variable – Range Which.](https://reader036.fdocuments.net/reader036/viewer/2022083006/56649f335503460f94c4f4e5/html5/thumbnails/4.jpg)
Standard Deviation
• Measure of diversity or dispersion • Measures variability• It shows how much variation or "dispersion"
there is from the average (mean, or expected value).
• The measures in a study can be placed on a curve– Normal curve– Skewed curves
![Page 5: Statistics for Psychology!. Refresher With a partner, define all of these terms: – Mean – Median – Mode – Population – Sample – Variable – Range Which.](https://reader036.fdocuments.net/reader036/viewer/2022083006/56649f335503460f94c4f4e5/html5/thumbnails/5.jpg)
Calculating Standard Deviation
![Page 6: Statistics for Psychology!. Refresher With a partner, define all of these terms: – Mean – Median – Mode – Population – Sample – Variable – Range Which.](https://reader036.fdocuments.net/reader036/viewer/2022083006/56649f335503460f94c4f4e5/html5/thumbnails/6.jpg)
Normal Distribution
![Page 7: Statistics for Psychology!. Refresher With a partner, define all of these terms: – Mean – Median – Mode – Population – Sample – Variable – Range Which.](https://reader036.fdocuments.net/reader036/viewer/2022083006/56649f335503460f94c4f4e5/html5/thumbnails/7.jpg)
To Remember – Normal Curve
• Mean, mode, and median all fall dead center• Normal curves measure within 3 deviations to
the positive and negative (to the right and left)
• 99.5% of all data will fall within 3 deviations• 95% of all data will fall within 2 deviations• 68% of all data will fall within 1 deviation
![Page 8: Statistics for Psychology!. Refresher With a partner, define all of these terms: – Mean – Median – Mode – Population – Sample – Variable – Range Which.](https://reader036.fdocuments.net/reader036/viewer/2022083006/56649f335503460f94c4f4e5/html5/thumbnails/8.jpg)
Skewed DistributionsA skewed distribution is a frequency graph that is higher on one side
than the other. For instance, a graph of the frequency of ages of people eating Trix cereal is probably higher in the younger ages than the older ages (positively skewed). A graph of the frequency and ages
of people eating Fiber cereal is probably higher in the older ages (negatively skewed).
![Page 9: Statistics for Psychology!. Refresher With a partner, define all of these terms: – Mean – Median – Mode – Population – Sample – Variable – Range Which.](https://reader036.fdocuments.net/reader036/viewer/2022083006/56649f335503460f94c4f4e5/html5/thumbnails/9.jpg)
Using Deviations and Curves