Miscellaneous Flashcards
Explain what average is.
(sum of terms)/(# of terms)
List other names for “average”.
Mean or arithmetic mean
Explain the term “median”.
Middle term when all the terms in the set are in sequential order.
If two terms in center, median is the average of those two terms.
Explain the term “mode”.
The term in a set that occurs most frequently.
Explain the term “standard deviation”.
Refers to how far apart the numbers in a set are from one another.
Explain how to calculate the standard deviation.
1) Calculate the average of the set.
2) Determine the differences between each number and the average.
3) Square these differences.
4) Calculate the average of those differences squared.
5) Take the square root of that average.
What percentage of events fall within 1, 2, & 3 standard deviations?
68%, 95%, 99.7%
Explain what the range of a set is.
The difference between the greatest term and the least term.
P(event)=?
P(event) =
of events/# of possibilities
P(non-event) = ?
P(non-event) =
1 - P(event)
Is Zero positive or negative?
Neither!
Facts on Sums of Integers:
Even + Even = Even
Odd + Odd = Even
Even + Odd = Odd
Facts on Products of Integers:
Even * Even = Even
Odd * Odd = Odd
Odd * Even = Even
Is Zero even or odd?
Even.
What is an irrational number?
A non-terminating, non-repeating decimal.
