Six Steps for Hypothesis Testing for Proportions
Null and alterative hypothesis
Random stats stuff
Random
100
What is the six steps for hypothesis testing for proportions?
Read the question very carefully
Summarize the given information
Write the null and alternative hypotheses and determine direction. Check for normality.
Calculate the z-cricital
Compute p-value; sketch and shade your distribution
Compare p-value to alpha; make decision
100
Is there a problem with this? If so why?
Ho: P=.23
H1: P>.23
Nope!
100
Would you you find the proportion (or p-value) to the right?
After you found the z-score you can not just use that value, you have to subtract it from one to get the right side of it.
100
What is one of the most covered songs in history?
Yesterday by the Beatles!
200
What are the two equations for checking normality? And why do we need to do this step?
n*(p-zero)>5 AND n*(q-zero)>5
To see whether or not we can use the z-table or not.
200
Is there a problem with this? If so why?
Ho: P equals .23
H1: P greater than or equal to .23
Yes, the alternative hypothesis will never be equal to because the alternative is trying to say that there is some sort of change.
200
Once you got your Z-critical to which decimal place do you round to and why?
You round to the second or the hundredths place. You do this because when you are looking at the Z-table you can only go back two decimal places.
200
What percent of adults believe that brown cows make chocolate milk?
7%
300
What is the equation that you use to find Z-critical?
Z= p-hat - p-zero/sqroot(p-zero)*(q-zero)/n
300
If the null hypothesis is rejected when it should have not been rejected which error is that? & which greek symbol goes with it?
Type one error 
300
A test shows that the proportion of people buying coffee cups has significantly changed from 54%. How would you write out the null and alternative hypothesis? What is the direction of the tail if there is one?
Ho: P=.54
H1: P≠.54
Two tailed/ no direction
300
What is the twitter birds name?
Larry T Bird