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the organized raw data list of the number of times or frequencies with which each score occurred and the percentage of times that it occurred
Are categorical, e.g., bond rating, convertible, callable
Are measured by real numbers, e.g., numerical measurement: coupon rate on a bond.
Measures of Distributions
center or central tendency
center of a distribution
middle score in a distribution
value that appears the most
bell-shaped normal distribution
when is the mean, median, and mode the same?
Test that assesses variables people share
highest score minus the lowest score
measure of variability that represents the range of the middle half of the data
Can test scores be valid but not reliable?
who called Q1 and Q3 the upper hinge and the lower hinge and the IQR the H-Spread?
median absolute deviation
what is very robust to outliers which means not sensitive
the square of the standard deviation, i.e., SD(2)
adjusting the denominator to n-1
what makes the variance an unbiased estimator?