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HW 9 (HT)
1.
With regards to hypothesis testing, define the p-value.
2.
Suppose that we were testing:
Ho:
2.6
vs. Ha:
2.6
and our conclusion was Fail to Reject Ho.
State the conclusion in words.
3.
If we fail to reject Ho, what have we learned?
4.
Company A claims that their tires have an average life of over 50,000 miles.
Data for company A has
been collected and summarized:
12
51,800
6,000
n
x
s
. Test the claim at the .05 level.
Ho: _______________
Test Statistic: ______________
Ha: _______________
p-value: __________________
Conclusion: __________________________
5.
An
.05
level test is performed on the computer.
The computer gives a p-value of .011.
Do we
reject or fail to reject Ho?
Circle ONE!
No Way to Tell
Reject Ho
Fail to Reject Ho

6.
Suppose that we are testing Ho:
45
vs. Ha:
45
at the .05 level and we are going to collect 10
pieces of data and
1.2
. Determine the probability of Type II error for the alternative
46.25
T
.
ANSWER______________________
7. True or False:
a) If we fail to reject Ho, then we feel certain that Ho is true.
T
F
b) When you collect more data, the probability of Type II error decreases.
T
F

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