1 We wish to test if the population of STAT 330 students who

1. We wish to test if the population of STAT 330 students who get A\'s is less than 25%. If T=4.59 then at alpha=0.01 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 1 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 population mean is equal to some specified value.

Solution

critical value for alpha = 0.01 is 2.32

so as you can see T is greater than critical value so we reject Ho

this test is a one tailed left

P( type 1 error ) = 0.01 ( alpha)

Alpha is the probability that the test statistic falls in the rejection region given the null hypothesis is a false statement.

False

Every time n>30, then we can use the Z-test for testing if population mean is equal to some specified value.

TRUE