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Statistics
Final Review
24
Mathematics
Undergraduate 1
05/02/2012
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Term
p
 Definition
true proportion of success for the population
Term
p-hat
 Definition
sample propotion of successes
Term
equation for q
 Definition
q=1-p
Term
M(p-hat)=
 Definition
p
Term
σ(p-hat)=
 Definition
sqrt(pq/n)
Term
assumptions for a proportion
 Definition
  1. np>10 nq>10
  2. random sampling
  3. independence
  4. <10% of population tested in sample
Term
normalcdf(?)
 Definition
(lower, upper, M, σ)
Term
M(x-bar)=
 Definition
M
Term
σ(x-bar)=
 Definition
σ/sqrt(n)
Term
M
 Definition
mean of a population
Term
σ
 Definition
standard deviation of a population
Term
x-bar
 Definition
sample mean
Term
assumptions for the mean sampling distribution
 Definition
  1. n>30 or ~Normal model
  2. random
  3. independent
  4. <10% of population
Term
sample size n
 Definition
p-hat*q-hat(z*/ME)^2
Term
ME margin of error (length of interval around p-hat)=
 Definition
z*sqrt(p-hat*q-hat/n)
Term
confidence interval for proportions
 Definition
p-hat +/- ME
Term
to find z score
 Definition
invnorm(%)
Term
p<alpha
 Definition
reject null
Term
p>alpha
 Definition
fail to reject null
Term
confidence interval for one proportion
 Definition
1-propzint (x,n,C-level)
Term
testing hypothesis about one proportion
 Definition
1propztest (pnot,x,n,<>=)
Term
confidence interval for two proportions
 Definition
2propzint
Term
testing hypothesis about 2 prop
 Definition
2propztest
Term

tcf(?)

chisquaredcdf(?)

 Definition
(lower, upper, degree of freedom)
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