If we set ? at 0.05, what can we do to increase power

QUESTION

If we set ? at 0.05, what can we do to increase power? Select one: a. Increase sample size b. Decrease sample size c. Increase the probability of a type II error Question 11 Not yet answered Marked out of 1.00 Flag question Question text The following situation applies to Questions 11-14. Your company markets a computerized medical diagnostic program used to evaluate thousands of people. The program scans the results of routine medical tests (pulse rate, blood tests, etc.) and refers the case to a doctor if there is evidence of a medical problem. The program makes a decision about each person. The hypotheses are: H0: The patient is healthy. Ha: The patient has a medical problem. Which of the following describes a type I error in this situation? Select one: a. Discharging a patient with a medical problem b. Sending a patient with a medical problem to the doctor. c. Sending a healthy patient to the doctor. d. Discharging a healthy patient. Question 12 Not yet answered Marked out of 1.00 Flag question Question text Which of the following describes a type II error in this situation? Select one: a. Discharging a patient with a medical problem. b. Sending a patient with a medical problem to the doctor. c. Sending a healthy patient to the doctor. d. Discharging a healthy patient. Question 13 Not yet answered Marked out of 1.00 Flag question Question text Suppose you are a patient most concerned about being discharged if you were sick. Which error probability would you choose to make smaller? Select one: a. Type I error probability b. Type II error probability Question 14 Not yet answered Marked out of 1.00 Flag question Question text Suppose you work for an insurance company which covers these types of routine doctor visits for some of its policyholders. The company desires to minimize costs by not sending a healthy patient to a doctor. Which error probability would you choose to make smaller? Select one: a. Type I error probability b. Type II error probability Question 15 Not yet answered Marked out of 1.00 Flag question Question text Which of the following questions does a test of significance answer? Select one: a. Is the sample or experiment properly designed? b. Is the observed effect due to chance alone? c. Is the observed effect important? d. Is the sample size large enough?

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