AP Statistics Final Exam Review questions and answers well completed

Categorical Data Assigns a unique value for each case, used to name or identify it Quantitative Data A variable in which the numbers act as a numerical value, always have units Stem and leaf plot Shows quantitative data values in a way that sketches the distribution of the data Ogive a graph that represents the cumulative frequencies for the classes in a frequency distribution Histogram Bar graphing for quantitative data CUSS Center, Unusual features, Shape. Spread Center The place in the distribution of a variable that you'd point to if you wanted to attemot summarizing the entire distribution with a single number; measures of ______ include the mean and median Spread/range A numerical summary of how tightly the values are clustered around the center; spread includes IQR and standard deviation Boxplot Displays the 5 number summary as a central box, whiskers that extend to the nonoutlying data values, and any outliers shown 5 number summary Minimum, Q1, Median, Q3, Maximum Quartiles The lower _________ is the value with a quarter of the data below. The upper ______ has 3 quarters of the data below it. The median and _______ divide data into 4 parts with equal numbers as data values IQR The difference between the first and third quartiles. IQR= Q3-Q1; Usually reported with the median Outlier Data value outside of upper or lower gates that can potentially skew the data's summary Variance Sum of standard deviations from the mean, divided by the count minus 1 Mean Summing data values and dividing by the count; usually paired with standard deviation Median The middle value, with half of the data above and half below it. If n is even, it is the average of the 2 middle values; usually paired with the IQR Standard Deviation Square root of the Variance; usually with the mean Normal Percentile The ___________ __