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AP Statistics Chapter 1 Flashcards

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5132785413VariablesCharacteristic of an individual0
5132785414Categorical VariablePlaces individual into a category1
5132785415Quantitative VariableTakes numerical values for which it makes sense to find an average2
5132785416Frequency TableTable of counts3
5132785417Relative Frequency TableDisplays percents4
5132785418Bar Graph- Label axes - Title graph - Scale axes appropriately - Each bar should correspond to the appropriate count - Leave room between bars5
5132785420Pie Chart- Include all the categories that make up the whole - Counts will be percentages6
5132785423ShapeSymmetric, skewed7
5132785424Measures of CenterMean, Median8
5132785425Mean- Most common measure of center - Arithmetic average9
5132785426Median- Midpoint of a distribution10
5132785427SpreadRange, IQR11
5132785428IQRThe middle 50%12
5132785429IQR EquationQ3 - Q113
5132785430Outlier EquationLess than Q1 - 1.5IQR Higher than Q3 + 1.5IQR14
5132785431Dotplot- Only need to properly label horizontal axis - Title - Each dot represents a count of 1 - Works well with a small data set15
5132785432Stemplot- Separate each piece of data into a "stem" and a "lead" - Write the stems vertically in increasing order from top to bottom - Write the leaves in increasing order out from the stem - Be very neat and leave the same amount of space between leaves - Title the graph - Include a key identifying what the stem and leaves represent - Works well with a small data set16
5132785433Histogram- Most common graph of a quantitative variable - The x-axis is continuous, no gaps between bars - Title the graph - Divide the range of data into classes of equal width - Label and scale the axes17
5132785434Five-Number SummaryMinimum, Q1, Median, Q3, Maximum18
5132785435Boxplot- Drawn from Q1 to Q3 - Line in the middle marks the median - Lines extend from the box to the smallest and largest observations that aren't outliers19
5132785436Standard Deviation- Find the distance of each observation from the mean - Square each of these distances - Average the distances by dividing their sum by n-1 - Take the square roon20
5132785437Round-off ErrorThe error from rounding decimals21
5132785438When describing the overall pattern of a distribution, you must address...- Center - Shape - Spread - Outliers22
5132785439Dotplot23
5132785440Histogram24
5132785441Bar Graph25
5132785442Frequency Table26
5132785443Relative Frequency Table27
5132785444Symmetric28
5132785445Skewed Right29
5132785446Skewed Left30
5132785447Pie Chart31
5132785448Segmented Bar Graph32
5132785449Two-Way Table33
5132785450Back-to-Back Stemplot34
5132785451Boxplot35
5132785452Is the mean sensitive to outliers?The mean is sensitive to outliers.36
5132785453If a distribution is skewed, use this measure of centerMedian37
5132785454Is the median sensitive to outliers?The median is not sensitive to outliers.38
5132785455If a distribution is exactly symmetric, the median and mean will beExactly the same39
5132785456If the distribution is skewed left, the mean willFall to the left40
5132785457If the distribution is skewed right, the mean willFall to the right41

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