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31) Referring to Table 12-4, the calculated value of the

Question : 31) Referring to Table 12-4, the calculated value of the : 1403640

 

31) Referring to Table 12-4, the calculated value of the test statistic is

A) -0.1777.

B) -0.0185.

C) 1.4999.

D) 1.5190.

32) Referring to Table 12-4, at 1% level of significance,

A) there is sufficient evidence to conclude that the proportions of errors in transactions assigned to each of the 5 memory locations are all different.

B) there is insufficient evidence to conclude that the proportions of errors in transactions assigned to each of the 5 memory locations are all different.

C) there is sufficient evidence to conclude that the proportion of errors in transactions assigned to each of the 5 memory locations are not all the same.

D) there is insufficient evidence to conclude that the proportion of errors in transactions assigned to each of the 5 memory locations are not all the same.

TABLE 12-5

 

Four surgical procedures currently are used to install pacemakers. If the patient does not need to return for follow-up surgery, the operation is called a "clear" operation. A heart center wants to compare the proportion of clear operations for the 4 procedures, and collects the following numbers of patients from their own records:

 

They will use this information to test for a difference among the proportion of clear operations using a chi-square test with a level of significance of 0.05.

33) Referring to Table 12-5, the test will involve ________ degrees of freedom.

34) Referring to Table 12-5, the overall or mean proportion of clear operations is ________.

35) Referring to Table 12-5, the expected cell frequency for the Procedure A/Clear cell is ________.

36) Referring to Table 12-5, the expected cell frequency for the Procedure D/Return cell is ________.

37) Referring to Table 12-5, the critical value of the test is ________.

38) Referring to Table 12-5, the value of the test statistic is ________.

39) True or False: Referring to Table 12-5, the null hypothesis will be rejected.

40) True or False: Referring to Table 12-5, the decision made suggests that the 4 procedures all have different proportions of clear operations.

 

 

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