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AP Statistics

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Fichas del conjunto (13)

15 number summaryA summary of quantitative data consisting of its minimun, first quartile,median,third quartile and maximum in a data set.
2Box and Whisker, BoxplotsAn illustration of the location of 25,50,75 and 100% of the data and where it stands on top of a number line.
3Interquartile Range, IQRis found with the formula Q3-Q1, this measures the range of the middle 50% of the data.
4OutliersAn observation that is drastically smaller/larger than the rest of the data and defies the distribution shape and tendencies.
Note: the residual from the predicted value according to the LSRL is large
5bar graphBars representing categorized values with its category on the explanatory axis and value on the responsive axis
6In order to fully compare distributions highlight the CUSS-Center (mean, median, midrange)
-Unusual features (outliers, gaps, clusters)
-Spread (IQR, range, variance, standard deviations)
-Shape (skewed left/right, symmetric)
Note: Make sure the response is in context of the problem presented, use comparative words like larger, smaller and descriptive words such as slightly, fairly or relatively.
7Stem plots REQUIRE a . . . KEYKEY
8Bimodal distributionsAny distribution that has two values that were heavily populated, also known as peaks
9UnimodalAny distribution that has one value that is heavily populated, also known as a peak.
10Percentile and decilesA specific point of a distribution of data that has a given percentage below it.
the value below which a given percentage of observations in a group of observations fall. For example, the 20th percentile is the value (or score) below which 20% of the observations may be found.
11Z-score/Standardized score Z= Xi - μ / σDistance from the Mean (average, μ) units of standard deviation (σ)
12Standard deviation, σThe typical distance between the observations from the mean.
13Variance