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Stats week 2

QuestionAnswer
Box plot a graph that gives a quick picture of the middle 50% of the data
First Quartile the value that is the median of the of the lower half of the ordered data set
Frequency Polygon looks like a line graph but uses intervals to display ranges of large amounts of data
Frequency Table a data representation in which grouped data is displayed along with the corresponding frequencies
Frequency - the number of times a value of the data occurs
Histogram a graphical representation in x-y form of the distribution of data in a data set; x represents the data and y represents the frequency, or relative frequency. The graph consists of contiguous rectangles.
Interquartile Range or IQR, is the range of the middle 50 percent of the data values; the IQR is found by subtracting the first quartile from the third quartile.
Interval also called a class interval; an interval represents a range of data and is used when displaying large data sets
Mean (average) measures the central tendency of data. Sum of values ÷ Number of values, Sum of values ÷ Number of values
Median a number that separates ordered data into halves; half the values are the same number or smaller than the median and half the values are the same number or larger than the median. The median may or may not be part of the data.
Midpoint the mean of an interval in a frequency table
Mode the value that appears most frequently in a set of data
Outlier an observation that does not fit the rest of the data
Paired Data Set two data sets that have a one to one relationship so that:
Paired Data Set both data sets are the same size, and each data point in one data set is matched with exactly one point from the other set.
Percentile a number that divides ordered data into hundredths; percentiles may or may not be part of the data. The median of the data is the second quartile and the 50th percentile. The first and third quartiles are the 25th and the 75th percentiles, respectively.
Quartiles the numbers that separate the data into quarters; quartiles may or may not be part of the data. The second quartile is the median of the data.
Relative Frequency the ratio of the number of times a value of the data occurs in the set of all outcomes to the number of all outcomes
Skewed used to describe data that is not symmetrical; when the right side of a graph looks "chopped off
Created by: Producer456
 

 



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