Question

Ha: P recommand L,90 4. A survey claims that 9 out of 10 doctors recommend aspirin for their patients with bad headaches. To test this claim against the alternative that the population proportion of doctors who recommend aspirin is less than 0.90. A random sample of 100 doctors was selected. Suppose you reject the null hypothesis with alpha = 0.01. (à. there is insufficient evidence to conclude that the proportion of doctors who recommend aspirin is 0.90 or more. b, there is sufficient evidence to conclude that the proportion of doctors who recommend aspirin is at least 0.90. & there is insufficient evidence to conclude that the proportion of doctors who recommend aspirin is less than 0.90. a. there is sufficient evidence to conclude that the proportion of doctors who recommend aspirin is less than 0.90 e we can conclude that the p-value in this particular test must exceed 0.05. 5. Four surgical procedures are currently 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 see if there is a relationship between the "clear" versus "non-clear" operations and the four procedures (A, B, C, and D). Using a sample of 142 patients, a p value of 0.0488 is found. Based upon this, the heart center should conclude: a. at alpha = 0.05, the average number of clear procedures differs between the four types of surgeries. b, at alpha = 0.05, there is not difference in the average number of clear procedures across the 4 types of surgeries. a at alpha = 0.01, there is a linear relationship between whether the procedure is clear and the type of procedure. d. at alpha = 0.05, whether or not the procedure is clear or not depends upon the type procedure. e. all of the procedures are about the same. Pvalue << =reject 05 =.os fail regeet .0438>.ol Pal brei

Answer 1

4.

The correct option is:

d. there is sufficient evidence to conclude that the proportion of doctors who recommend aspirin is less than 0.90.

5.

The correct option is:

d. at alpha = 0.05, whether or not the procedure is clear or not depends upon the type of procedure.

Note: It can be answered by keeping in mind that the variables are categorical, hence chi-square test of independence will be used.

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