MATH 225.FINAL EXAM LATEST 2020

MATH 225.FINAL EXAM LATEST 2020

QUESTION 1

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1/1 POINTS

A company has developed a wristband for monitoring blood sugar levels without requiring direct blood samples. It is interested in demonstrating the accuracy of the

device for governmental approval and has decided to test the claim "The glucose level reported by the wristband is within 10%10% of a standard blood test result." Which of

the following data collection processes would be appropriate? Select only one answer choice.

Choose a random sample of employees at lunchtime and measure their blood sugar using both the wristband and a standard blood test.

Choose a random sample of people from the local area and random times throughout the day and measure their blood sugar using both the wristband and a standard blood test.

Choose a random sample of people from the local area and random times and measure their blood sugar using the wristband. Choose another random sample of people and random times and measure their blood sugar using the standard blood test.

Go to a hospital and have the doctors choose a random sample of patients to be tested at random times using both the wristband and the standard blood test.

Answer Explanation

Correct answer:

To compare the wristband to the standard blood test, both methods should be used to measure the blood sugar of the same person at the same time. The people chosen should be random, and the time of measurement should be random to help eliminate the effects of any confounding variables.

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