P and more
What does p mean?
The population parameter
What are the conditions for a confidence interval/test?
Random, independent, normal
What is the formula for a confidence interval (in words)?
point estimate ± margin of error
What is the definition of the p-value?
The probability of the event occurring given the null hypothesis is true
When you reject Ho what type of error can you make?
Type l error
What does p̂ mean?
the sample statistic
What should be in the state section of a confidence interval?
C%, state the parameter, the value of p̂
What happens to the margin of error as the confidence level increases?
The margin of error increases
What should the null hypothesis be for a one sample z-test?
Ho should be equal to p
When you fail to reject Ho what type of error can you make?
Type ll error
What is the estimated p̂ when it is not stated?
.50
How is the random condition checked?
Random sampling or random assignment
What happens to the margin of error as the sample size increases?
the margin of error gets smaller
What should be the alternative hypothesis for a one sample z-test?
HA should be above or below the value of the null
How do you increase power?
Increase the significance level
What does the confidence level tell you?
The long-term capture rate for calculating the confidence interval
How is the normal condition checked in a confidence interval?
Large counts.
np≥10
n(1-p)≥10
What would make a small margin of error?
A large sample size and a small confidence level
What should you do if the p-value is less than the significance level?
Reject the null hypothesis
If the Type ll error increases, what is true about power?
Power decreases
When should the significance level be set?
Before the test
What must always be stated in either the "plan" or "do" section?
Stating the inference
What is another name for point value?
Test statistic
Do you "fail to reject" or "accept" the null hypothesis?
Fail to reject
What is the symbol for Type l error?
alpha