AP Statistics (Unit 1) Flashcards

14723401137	Variables	Characteristic of an individual	0
14723401138	Categorical Variable	Places individual into a category	1
14723401139	Quantitative Variable	Takes numerical values for which it makes sense to find an average	2
14723401140	Frequency Table	Table of counts	3
14723401141	Relative Frequency Table	Displays percents	4
14723401142	Bar Graph	- Label axes - Title graph - Scale axes appropriately - Each bar should correspond to the appropriate count - Leave room between bars	5
14723401143	Pie Chart	- Include all the categories that make up the whole - Counts will be percentages	6
14723401144	Shape	Symmetric, skewed	7
14723401145	Measures of Center	Mean, Median	8
14723401146	Mean	- Most common measure of center - Arithmetic average	9
14723401147	Median	- Midpoint of a distribution	10
14723401148	Spread	Range, IQR	11
14723401149	IQR	The middle 50%	12
14723401150	IQR Equation	Q3 - Q1	13
14723401151	Outlier Equation	Less than Q1 - 1.5IQR Higher than Q3 + 1.5IQR	14
14723401152	Dotplot	- Only need to properly label horizontal axis - Title - Each dot represents a count of 1 - Works well with a small data set	15
14723401153	Stemplot	- 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 set	16
14723401154	Histogram	- 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 axes	17
14723401155	Five-Number Summary	Minimum, Q1, Median, Q3, Maximum	18
14723401156	Boxplot	- 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 outliers	19
14723401157	Standard 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 root	20
14723401159	When describing the overall pattern of a distribution, you must address...	- Center - Shape - Spread - Outliers	21
14723401166	Dotplot		22
14723401167	Histogram		23
14723401168	Bar Graph		24
14723401169	Frequency Table		25
14723401170	Relative Frequency Table		26
14723401171	Symmetric		27
14723401172	Skewed Right		28
14723401173	Skewed Left		29
14723401174	Pie Chart		30
14723401175	Segmented Bar Graph		31
14723401176	Two-Way Table		32
14723401177	Back-to-Back Stemplot		33
14723401178	Boxplot		34
14723401160	Is the mean sensitive to outliers?	The mean is sensitive to outliers.	35
14723401161	If a distribution is skewed, use this measure of center	Median	36
14723401162	Is the median sensitive to outliers?	The median is not sensitive to outliers.	37
14723401163	If a distribution is exactly symmetric, the median and mean will be	Exactly the same	38
14723401164	If the distribution is skewed left, the mean will	be less than median	39
14723401165	If the distribution is skewed right, the mean will	be more than median	40