ap stat notes 2
Subject:
Statistics [1]
Stem and Leaf Plot of Women’s Scores on the Survey of Study Habits and Attitudes
Five Number Summary
101— Minimum
126— Q1
138.5— Median
154— Q3
178— Maximum
In order to test for outliers, we must multiply the IQR (Interquartile Range—This is the difference between Q1 and Q3) by 1.5. Any outliers will lie outside of Q3+IQR or Q1−IQR.
By using this test, we can see that the IQR is 28. 28*1.5=42.
42+154= 196. The maximum lies above this value, making 200 an outlier in this set of data.
126-42= 84. The minimum is 101, so there aren’t any lower outliers.
4. Side by Side Stem and Leaf Plot of the Male and Female Scores on the Survey of Study Habits and Attitudes
Women’s Scores Stem Boy’s Scores
7 0 5
8 8
9 1 2
9 3 1 10 4 8 9
5 11 3 4 5 5
9 6 6 12 6
7 7 13 2