test 11b
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Statistics
Forum reference:
Book page:
http://course-notes.org/Statistics
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test 12b
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5 steps to A Statistics
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Standard Deviation
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TI-82: Generating Random Numbers
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You can generate random numbers on the TI-82 calculator using the following sequence. N is the number of different values which could be and S is the minimum number.
int (N*rand+S)
INT is found under the MATH menu (math num 4). RAND is also found under the MATH menu (math prb 1).
Simulate the rolling of a die (1-6): int (6*rand+1)
Simulate the flipping of a coin (0-1): int (2*rand)
This works because the rand function returns a random number between 0 and 1 (including 0 but not including 1). When it is multiplied by N, it becomes between 0 and N, and then S is added, so it becomes between S and S+N.
If you have two values (A and B) that you need random numbers between, then you can generate them using the following formulas.
N=B-A+1
int (N*rand+A)
AP Stat Review Slideshow
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AP Statistics Practice Test
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ap stat notes 2
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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
ap stat notes
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Coefficient of Determination ()
Is just another way of saying strength of a linear relationship
stat
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stat
Pages
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