Quantative reasoning Flashcards
dependent and independent evens in probability
independent = probabilities are the same
dependent = probabilities are different
spreadsheet formulae
x^2 = A2^2
X x Y = X*Y
SQRT (A2)
XE-03 = X x 10^-3
dragging down in spreadsheet
Cell A1 put any number
Cell A2 put A1 + another number
.click on the bottom right until a plus appears and drag downwards
$ in spreadsheet
A1 + B1 = C1
A1 + C1 = D1
quadratic equation
annual percentage growth/compound interest
N = N0 x (1 + r/100)^n
N0 = amount orginally
r = percentage of increase/decrease
n = num of years
index numbers
.shows how value of goods changes overtime
.starts with a base year = 100
increase in index by 5% = 105
reverse percentage
new/1-change in p
bounds
X +- Y
travel agency conversions
we sell = e.g 1.11 = £1 = 1.11 euro
we buy = e.g 1.35 = 1.35 euro = £1
annual equivalent rate(AER)
the percentage your investment will grow in a year
annual percentage rate(APR)
rate you have to pay if you were charged interest once a year
types of data
.categorical- no numbers
.dicrete numerical data- values are resistricted to a amount of possibilites e.g passengers in a car
.continuous numerical data- takes any realistic value e.g height
histograms
frequency density = frequency/class width
gradients
rise/run
