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Unformatted text preview: ; Max = 66;
First Quartile Q1, = 23 median below the actual data median;
Second Q2, = 30.5 middle, median;
Third Q3 = 36.5 median above the actual data median,
So interval distance between min, three quartiles and max, is
18 (or 23 is 1st median -5 min value) ,
7.5 (30.5 is 2nd median – 23 is 1st median),
6 (36.5 is 3rd median – 2nd median 30.5)
29.5 (66 is max – 36.5 3rd median)
Greatest variation is in the fourth quarter.
Outliers – observations that fall well outside the overall pattern of the data set (extremely far
from the mean)
Lower and Upper Limits: use of these and interquartile ranges to identify potential outliers.
Q 1 = 23
Q3 = 36.5
IQR = 13.5
Lower Limit = 2.75 hours or Lower Limit = 23-1.5(13.5) = 2.75 hours
Upper Limit = 56.75 hours or Upper Limit = 36.5+1.5(13.5) = 56.75 hours 5 Interpretation: Weekly viewing time of 66 falls outside the overall pattern of the other 19
viewing times (original n = 20).
Boxplot – also called a box and whisker diagram is based on the fiv...
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- Spring '14