Stats And Prob Flashcards
Estimate of parameters confidence level 90%
1.65
Estimate of parameters confidence level 95%
1.96
Estimate of parameters confidence level 99%
2.58
Wstimation of parameters confidence interval
X - Za/2 (0/ √n) < u < X + Za/2 (0/ √n)
Maximum likely difference between the observed sample mean and the true value of the population mean
Margin of error
Find the confidence coefficients, what formula r u gonna use?
N-1 then look at t table
Find the interval estimate, what formula to use?
X- Za/2 (O/√n) < u < X + Za/2 (O/ √n)
Find the sample size of the given, what formula to use?
N= (za/2 x o)^2
———
E
Two types of hypothesis
Null and alternative
Rejecting the truth is what type of error ?
Type 1 error
Accepting the false hypothesis is what type of error?
Type 2
One tailed , 1%
2.33
Two tailed 1%
2.575
One tailed 5%
1.645
Two tailed 5%
1.96
One tailed 10%
1.28
Two tailed 10%
1.645
P>a
P=a
Reject / accept?
Reject
P>a
Reject/ Accept?
Accept
P hat is ?
Sample proportion
P is ?
Population proprotion
How to get p hat
X/n
How to get q?
1-p
Only one variable -correlation
Univariate data
