Question

Apple, Inc. reported that “0.5% (0.005) of participants received irregular pulse notifications indicative of possible AFib” which is a dangerous heart condition that needs an immediate trip to the emergency room. To improve benefits of pulse notifications, it is important to identify the percentage of people receiving false notifications. A cardiologist is concerned that the percentage of people who actually have these types of irregular heartbeats is not accurate. The doctor randomly selected a simple random sample of 2315 adults who own Apple watches and asked if they have received one of these irregular heartbeat notifications. Nine of the respondents reported receiving such a notification. Does this evidence support the cardiologists claim that the percentage of people who receive notifications of irregular heartbeats is not 0.5% (0.005)? Use a 0.01 level of significance. Conduct the 1-proportion Z­-test to determine the p-value and decision of the test. Question options:

P-value = 0.4480. Reject Ho.

P-value = 0.2240. Reject Ho.

P-value = 0.7760. Fail to reject Ho.

P-value = 0.2240. Fail to reject Ho.

P-value = 0.4480. Fail to reject Ho.

Answer 1