STT EXAM WITH 100% CORRECT
ANSWERS
What is the success failure condition - Answer- A binomial model is approximately
Normal if we expect at least 10 successes and 10 failures
What are the equation(s) for the success-failure model - Answer- (1 - proportion (π) X n
> or equal to 10, and n X pi > or equal to 10
If your population is normally distributed, there is no ________________ requirement
for the CLT to apply - Answer- sample size
For the CLT to apply when a population is skewed, a sample size should be - Answer- >
or equal to 25
What is a hypothesis test - Answer- You assume a claim is true, then check if your data
is too unlikely under that assumption to believe it.
4 steps of hypothesis test - Answer- establish question based on claims about the
parameter, compute a test statistic and identify sampling distribution, compute p-val,
use p-val and other summaries to draw conclusion
What is Null hypothesis coined as - Answer- H0
What is another name for null hypothesis - Answer- status quo
What is Alternative hypothesis coined as - Answer- Ha
Ion hypothesis test, we examine whether sample data provides evidence against the
_______ hypothesis and supports the ________ hypothesis - Answer- null, alternative
Null hypothesis (H0) is represent by symbol _______ and alternative hypothesis (Ha)
represented by ________ - Answer- = (equality), ≠ < > (inequality)
We summarize a observed sample of data using a ________ - Answer- test statistic
A common null distribution for hypothesis concerning π - Answer- N(0,1)
A common null distribution for hypothesis concerning µ - Answer- t(df)
ANSWERS
What is the success failure condition - Answer- A binomial model is approximately
Normal if we expect at least 10 successes and 10 failures
What are the equation(s) for the success-failure model - Answer- (1 - proportion (π) X n
> or equal to 10, and n X pi > or equal to 10
If your population is normally distributed, there is no ________________ requirement
for the CLT to apply - Answer- sample size
For the CLT to apply when a population is skewed, a sample size should be - Answer- >
or equal to 25
What is a hypothesis test - Answer- You assume a claim is true, then check if your data
is too unlikely under that assumption to believe it.
4 steps of hypothesis test - Answer- establish question based on claims about the
parameter, compute a test statistic and identify sampling distribution, compute p-val,
use p-val and other summaries to draw conclusion
What is Null hypothesis coined as - Answer- H0
What is another name for null hypothesis - Answer- status quo
What is Alternative hypothesis coined as - Answer- Ha
Ion hypothesis test, we examine whether sample data provides evidence against the
_______ hypothesis and supports the ________ hypothesis - Answer- null, alternative
Null hypothesis (H0) is represent by symbol _______ and alternative hypothesis (Ha)
represented by ________ - Answer- = (equality), ≠ < > (inequality)
We summarize a observed sample of data using a ________ - Answer- test statistic
A common null distribution for hypothesis concerning π - Answer- N(0,1)
A common null distribution for hypothesis concerning µ - Answer- t(df)
