Measures Of Central Tendency Flashcards
It is the observation which lies in the middle of the ordered observation
Median
It is then observation or observations of the highest frequency
Mode
It is defined as the positive root of the product of observations.
Often used for a set of numbers whose values are meant to be multiplied together or are exponential in nature.
Geometric mean
It is appropriate for situations when the average of rates is desired.
It is the number of the variables divided by the sum of the reciprocals of the variables,
Harmonic mean
It is a way of summarizing a set of data measured on an interval scale.
Similar to the histogram, but more informative display for reltively small data sets (
Steam and leaf plot
It is an observation in a data set which is far removed in value from the others in the data set. Unusually large or unusually small value. Can be the result of an error in measurement
Outlier
Are a set of cut points that divide a sample of data into groups containing equal numbers of observations
Quantile
Are values that divide a sample of data into one hundred groups containing equal numbers of observations.
Percentile
Are values that divide a sample of data into four groups containing equal numbers of observations
Quartile
A way of summarizing a set of data measured, a type of graph which is used to show the shape of the distribution, its central value and variability,
Box plot
Is a measure of symmetry or more precisely, the lack of symmetry
Skewness
Is symmetric if it looks the same to the left and right of the center point
Distribution or data set
Is a measure of wether the data are peaked or flat relative to a normal distribution
Kurtosis
