3. If we wish to determine whether there is evidence that theproportion of succe

Question

3.

If we wish to determine whether there is evidence that theproportion of successes is the same in group 1 as in group 2, theappropriate test to use is

A) the Z test.
B) the2 test.
C) both of the above
D) none of the above

4.

True or False: When using the 2 tests forindependence, one should be aware that expected frequencies thatare too small will lead to a too big type I error.

A) True
B) False

5.

True or False: If we use the chi-square method of analysis totest for the difference between proportions, we must assume thatthere are at least 5 observed frequencies in each cell of thecontingency table.

A) True
B) False

10.

The bank manager wanted to test whether the proportion of errorsin transactions assigned to each of the 5 memory locationsdiffer.


Referring to Table 12-3, which test would be used to properlyanalyze the data in this experiment?

A) 2test of independence
B) 2test for differences between two proportions (independentsamples)
C) 2test for the differences among more than two proportions
D) 2test for differences between two proportions (relatedsamples)

memory location 1 2 3 4 5 # of transactions 82 100 74 92 102 # of reported errors 11 12 6 9 10

Explanation / Answer

3. If we wish to determine whether there isevidence that the proportion of successes is the same in group 1 asin group 2, the appropriate test to use is

A) the Z test.

4. True or False: When using the2 tests for independence, one should be aware thatexpected frequencies that are too small will lead to a too big typeI error.

10.

memory location 1 2 3 4 5 # of transactions 82 100 74 92 102 # of reported errors 11 12 6 9 10

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