. We wish to test if the proportion of STAT 330 students who get A’s is less tha
ID: 3396611 • Letter: #
Question
. We wish to test if the proportion of STAT 330 students who get A’s is less than 25%. If T = 4.59 then at alpha = .01 what is the correct decision?
a. Reject Ho b. do not reject Ho c. accept Ho
2. Classify the test in question one.
A. two-tailed B. one tailed left
C. zero tailed D. one tailed right
3. P(type I error) =
4. True or False. Alpha is the probability that the test statistic falls in the rejection region given the null hypothesis is a false statement.
5. True or False. Every time n > 30, then we can use the Z-test for testing if the population mean is equal to some specified value.
Explanation / Answer
We wish to test if the proportion of STAT 330 students who get A’s is less than 25%. If T = 4.59 then at alpha = .01 what is the correct decision?
This is left tailed test but test statistic is positive. This means, p-value is greater than 0.5. Therefore, do not reject null hypothesis at = 0.01. Therefore, correct option is:
b. do not reject H0
---------------------------------------------------------------------------------------------------------
2. Classify the test in question one.
Since alternative hypothesis is less than type, this is left tailed test. Therefore, correct option is:
B. one tailed left
---------------------------------------------------------------------------------------------------------
3. P(type I error) = Level of significance = 0.01
---------------------------------------------------------------------------------------------------------
4. False. Alpha is the probability of type I error.
---------------------------------------------------------------------------------------------------------
5. True. Every time n > 30, then we can use the Z-test for testing if the population mean is equal to some specified value.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.