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3 Cards in this Set
- Front
- Back
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In how many ways can the letters AABB be arranged uniquely in a row? |
1. Always use formula 2. 4! / 2! 2! |
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standard deviation facts |
1. Never a negative number 2. Represents typical distance of a data point from the median 3. How close the numbers in a set are to the sets average 4. Standard deviation is slightly lower than the spaces between terms 5. The farther a new number is from the mean of the set the more the s.d. Will increase 6. When you need to find what set has the largest standard deviation, always look for set with the largest range! (Only when the sets to compare have the same number of terms and the terms on both sets are evenly spaced)
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standard deviation rules (tricks) |
1. When you need to find what set has the largest standard deviation always look for the set with the largest range (Only when the sets to compare have the same number of terms and the terms on both sets are evenly spaced) 2. A decrease or increase in all set elements by a constant percentage will decrease or increase s.d. By the same percentage. 3. New numbers added: The numbers closer to the mean , the greatest they decrease the s.d. 4. New numbers added: the numbers farther away to the mean, the greatest they increase the s.d.
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