Chapter 3 & 4
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| measures of central tendency such as ________________________________ summarize a distribution of scores by describing the most common, the middle score, or the average score of the distribution | show 🗑
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| central purpose of descriptive statistics is to __________________ data | show 🗑
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| always the exact center of a distribution of scores | show 🗑
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| median can be found for _______________ data, but generally it more appropriate for ______________ data. | show 🗑
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| ______________identifies a point below which a specific percentage of cases fall | show 🗑
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| show | 50th
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| D1 or the first decile is the point below which ______________ of the cases fall | show 🗑
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| show | above 75% of the scores
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| show | mean (x bar)
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| formula for mean (x bar)= | show 🗑
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| three characteristics of the mean: | show 🗑
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| show | mean is pt around which variation of score is minimized; if difference b/t scores and mean are squared and then added, the resultant sum will be less than the sum of the squared differences b/t the scores and any other point in the distribution
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| show | least squares principle
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| distributions with outliers have a ___________: | show 🗑
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| show | it will skew to the right (+) = (mean>median)
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| when mean > median, what would you expect your distribution curve to look like? | show 🗑
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| if you have some extremely low outliers, what will happen to the distribution curve? | show 🗑
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| show | skewed to the left (- skew)
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| show | in the direction
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| show | greater
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| the mean and median will have the same value only in distributions that are ________________- | show 🗑
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| show | common value; nominal-level
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| show | measures of dispersion
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| measure of dispersion can reveal substantial differences between distributions even when _____________________ are the same | show 🗑
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| range: | show 🗑
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| the greater the value of a range the greater the _______________ in the distribution | show 🗑
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| show | range might exaggerate the amount of dispersion for most of scores in distribution
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| show | the distance from the third to 1st quartile; a kind of range that acoids some of the problems associated with range outliers by considering only the middle 50% of the cases in distribution
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| show | should use all the scores in the dist; should describe the average or typical deviation of the scores; increase in value as the scores become more diverse
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| the sum of squared deviations will _______________ with sample size | show 🗑
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| using the median, range and IQR depicts both the _______________ and _____________________- | show 🗑
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| horizontal line in the middle of the IQR box represents : | show 🗑
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| scores that are beyond 3 times the height of the IQR box in either direction are termed: | show 🗑
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| the standard deviation is ____________ for more diverse distributions and ______________ for less diverse distributions | show 🗑
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| show | the sum of all data points
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| show | false - no variance
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| if you take all data points in a sample and find the difference between the mean and the sum, the answer will always be? | show 🗑
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| the sum of x sub i - x bar = | show 🗑
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| limitations to mean: | show 🗑
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
aereal