AP Statistics Flashcards
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| 10593060722 | population | all the cases we wish to know about | 0 | |
| 10593061873 | Sample | the cases we actually examine in seeking to understand the much larger population | 1 | |
| 10593063502 | variable | something that holds the same characteristic for many cases | 2 | |
| 10593065688 | categorical variable | a variable that names categories (whether with words or numerals) | 3 | |
| 10593070473 | quantitative data | a variable in which the numbers act as numerical values. They always have units | 4 | |
| 10593077892 | independence | variables are said to be this if the conditional distribution of one variable is the same for each category of the other | 5 | |
| 10593086370 | shape | to describe this part of a distribution, look for single vs. multiple modes, symmetry vs. skewness, outliers and gaps | 6 | |
| 10593099990 | center | the place in the distribution of a variable that you would point to if you wanted to attempt to summarize the entire distribution with a single number. Mean and median would show this. | 7 | |
| 10593108145 | spread | a numerical summary of how tightly the values are clustered around the center. IQR and standard deviation would show this | 8 | |
| 10593113588 | mode | a hump or local high point in the shape of the distribution of a variable (uni or bi) | 9 | |
| 10593116265 | uniform | a distribution that's roughly flat | 10 | |
| 10593125198 | symmetric | a distribution is this if the two halves on either side of the center look approximately like mirror images of each other (use mean or median to determine center) | 11 | |
| 10593127775 | skewed | a distribution is this if one tail stretches out farther than the other (use median to determine center) | 12 | |
| 10593134831 | outlier | extreme value that doesn't appear to belong with the rest of the data. It is calculated as any point that is 1.5 (IQR) from either end of the box in a boxplot. | 13 | |
| 10593137578 | median | middle value of the data | 14 | |
| 10593138934 | range | difference between highest and lowest values in data set. | 15 | |
| 10593140636 | Interquartile Range | the different between the first and third quartiles. It is usually reported along with the median | 16 | |
| 10593148973 | mean | summing all the data values and dividing by the count (n) | 17 | |
| 10593154112 | standard deviation | tells on average how far data falls from the mean. It is the square root of the variance. | 18 | |
| 10593251042 | Upper fence | Q3 + 1.5 (IQR) | 19 | |
| 10593252196 | Lower fence | Q1 - 1.5(IQR) | 20 |