Mathematics

Finding Sample Mean

Sum of all the values divided by the amount of values

Finding Sample Me (Median)

Middle observation when the sample is sorted smallest to largest

Finding Mo (Mode)

Most frequent observation

Var (Variant)

(x₁ - MEAN)² + (x₂ - MEAN)² ….etc divided by amount of numbers MINUS 1

st. dev (standard deviation)

square root of the variant

Exponential Functions Properties -
a^t x a² = ?

= a^t+s

Exponential Function Properties -

a^t / a^s = ?

= a^t-s

Exponential Function Properties -

(a^s)^t = ?

a^{s x t}

Logarith Properties - rearranging to exponential function

log_a(x) = y

x=a^y

Logarithm Properties -

log_a(a^x)=?

= x

log_a(b) + log_a(c ) =

= log_a(b x c)

log_a(b) - log_a(c ) =

= log_a(b / c)

log_a(x^p) =

p x log_a(x)

log_a(b) =

log_c(b) / log_c(a)

pick your own c variable

if two logs have the same base then…

the logs cancel out and leave the base