Formula to check if a probability distribution is normal
Np>15
N(1-p)>15
Formula to find SD for probability
Sd= p(1-p)/ n [all of that is squared]
Z score for probabilty (z score is what you put inside of parentheses)
Z = p(hat) -p/ (square root of) p(1-p)/n
What does p hat equal?
Smaller sample out of the sample
Ie: 4/300
Test statistic formula
T= x bar- Mo/ sd/square root of n aka SE
Mo?
Hypothesized value
DF
N-1
Rejecting a a true Ho and supporting a false Ha
Type 1
Not rejecting a false Ho and not supporting a true Ha
Type 2
When you choose a smaller alpha you see more likely to avoid ?
Type 1
When you choose a larger alpha, reduces the chance of a ?
Type 2 erroe