Term
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Definition
| on a normal curve, 90 percent of the area is to the left |
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Term
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Definition
| on a normal curve, 60 percent of the area is to the left |
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Term
| calculating the number of combinations of 3 workers chosen from a group of 8 |
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Definition
8!/5!3!
(8*7*6)/(3*2*1) = 56 |
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Term
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Definition
| sum the values of the variable (each identical value can be mutliplied by its specific frequency, and the sum of those products can be summed) and divide it by the sum of ALL frequencies |
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Term
| Least common multiple of 9 & 12 |
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Definition
using prime factorization
9: (3)^2
12: (3)(2)^2
so the LCM is (3)^2 * (2)^2 = 36 |
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Term
| least common multiple of 55 & 66 |
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Definition
Prime factorization
55: (5)(11)
66: (6)(11)
LCM is (5)(6)(11) = 330 |
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Term
| inequality, multiplying or dividing by a negative number means |
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Definition
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Term
| midpoint of successive integers |
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Definition
| highest - (highest-lowest)/2 |
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Term
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Definition
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Term
f(x) = 2x + 4
what is the slope, what is the y intercept? |
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Definition
2 is the slope
4 is the y intercept |
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Term
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Definition
| r & s are factors, or divisors, of t. |
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Term
rs=t
what is t in relation to r? to s? |
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Definition
t is a multiple of s
t is a multiple of r
t is divisible by s
t is divisible by r |
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Term
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Definition
6 factors, or divisors
-4, -2, -1, 1, 2, 4 |
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Term
| least common multiple of a & b |
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Definition
| the least positive integer that is a multiple of both a & b |
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Term
| greatest common divisor/factor of a & b |
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Definition
| the greatest positive integer that is a divisor/factor of of both a & b |
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Term
| equation representing an integer N divided by a non-zero integer D resulting in a quotient Q and a remainder R |
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Definition
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Term
| 20/7 quotient and remainder equation |
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Definition
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Term
-17 / 7
quotient and remainder |
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Definition
N=DQ+R
-17 = 7*-3 + 4
(remember, 0 |
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Term
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Definition
| has only 2 positive divisors/factors: 1 and itself |
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Term
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Definition
| the product of all positive integers less than or equal to 'n', where 'n' is any positive integer |
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Term
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Definition
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Term
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Definition
>no repetition
>order irrelevant |
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Term
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Definition
> repetition ok
> order relevant |
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Term
| intersection of sets A & B |
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Definition
| the set of elements that are in both sets A & B |
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Term
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Definition
| the set of elements that are in sets A or B or both. |
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Term
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Definition
| mutually exclusive sets, with nothing in common |
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Term
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Definition
| all elements of set A are also in set B |
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Term
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Definition
middle of a data
for odd sample, middle number
for even sample, middle two integers averaged |
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Term
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Definition
| most frequently ocurring number |
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Term
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Definition
3 numbers that divide the data into 4 groups
from the least number up to the first quartile
from the first quartile to the second quartile
from the second quartile to the third quartile
from the third quartile to the last number |
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Term
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Definition
| greatest number in a list minus the least number |
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Term
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Definition
| third quartile minus the first quartile |
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