normal distribution Flashcards
normal distribution
mean and VARIANCE
what is variance
STANDARD DEVIATION SQUARED
what data is normal distribution for
continuous
are under curve for normal
1
how to find probability between 2 values
find area under the curve between those 2 values
how much data approx lies within 1 standard deviation either side
68%
how much data approx lies within 2 standard deviation either side
95%
how much data approx lies within 3 standard deviation either side
99.7%
how many standard deviations does 100% of the data approx lie within
3 standard deviations either side
inverse normal
IS ONLY LESS THAN
make sure you can do all
standard normal
what is a Z score
how many standard deviations above / below the mean
when can you approximate a binomial to a normal
if n is large
if p is close to 0.5
approximating a binomial formula