2. Which of the
following encompasses an “claim” involved in a hypotheses test.
a. Ho
b. Ha
c. Either a or b
d. None of the
above
11. Receiving a
false positive on an engineering job interview drug test means the testing
facility has?
a. Committed a type
1 error
b. Committed a type
2 error
c. Made the correct
decision
d. None of the
above
13. Firing an
engineer under your supervision for failing a drug test means somebody.
a. Committed a type
1 error
b. Committed a type
2 error
c. Made the correct
decision
d. Either a or c
14. A statistical
test that involves a “before and after” focus with 20 subjects has how many
degrees of freedom.
a. 9
b. 19
c. 38
d. 39
15. Assuming
normality and independence, if n1 or n2 or both are <30, if you have just
rejected the Ho in an F test, the next test you are likely to perform is a:
a. independent t
test
b. chisquared test
c.
SmithSatterthwaite test
d. paired ttest
Multiple Choice 4 pts each.
21. For an
equiprobable chisquared goodness of fit test with an HO of uniformly
distributed with the same parameters as the sample for 24 obs., you would
have how many degrees of freedom.
a. 2
b. 3
c. 4
d. none of the
above
22. If you had an
equiprobable chisquared goodness of fit test with an HO of Normally
distributed with a given theoretical mean of 12.23 and a given std of 3.54 and
you had 4 cells, what would be the critical value at alpha=0.05
a. 3.841
b. 5.991
c. 7.815
d. 9.488

19. An equiprobable
approach goodness of fit test with 8 cells for data that is normally
distributed with a theoretical given mean of 10 and a std of 2, would have
how many degrees of freedom for the critical value?
a. 5
b. 6
c. 7
d. 8
20. Assuming
normality and independence, if n1 or n2 or both are <30 if you cannot
reject the Ho in an F test, the next test you are likely to perform is a:
a. independent t
test
b. chisquared test
c.
SmithSatterthwaite test
d. paired ttest
24. Assuming
normality, to determine which comparison of means test to use, you must first
run an F test. For this test the Ho:
is the variances are the same. The Ha:
is the variances are not the same. At
an alpha level of 0.10 what is your decision?
a. Cannot reject Ho
b. Reject Ho
c. I need to retake
this course
d. Cannot determine
from the above information
25. For the appropriate comparison of means test,
calculate the approximate test statistic and determine if you cannot reject
or reject the Ho at a 0.01 level assuming normality, independence, and =
variance.
a. Cannot reject Ho
b. Reject Ho
c. I need to retake
this course
d. None of the
above
26. If you are
suspicious of a claim that one product has at least 50 more operational
cycles one the average than another the Ha would be
For question 27, the following data represents the number
of defects produced before and after quality training in 6 different
industrial plants. You would like to
see if the training is effective in reducing defects. Before is set 1, after is set 2. Assume normality.
Before 13, 15, 18,
11, 13, 12, 14
After 11, 16, 16,
12, 11, 13, 14
27. What is the
null hypotheses?
a. u1u2 = 0
b. uD = 0 or
uD<=0
c. Dbar= 0
d. uD not =0
34. If you are
comparing the means of a new less expensive, but more productive system
versus an existing system with unequal variances, using a rational thought
process, you would want to determine your critical value degrees of freedom
by:
a. rounding down
b. rounding up
c. Does not apply
d. Not enough
information to decide
