Answer all plz More dogs are being diagnosed with thyroid problems than have bee

Question

Answer all plz More dogs are being diagnosed with thyroid problems than have been diagnosed in the past. A researcher identified 50 puppies without thyroid problems and kept records of their diets for several years to see if any developed thyroid problems. This is a(n) randomized experiment observational prospective study survey The owner of a car dealership planned to develop strategies to increase sales. He hoped to learn the reasons why many people who visit his car lot do not eventually buy a car from him. For one month he asked his sales staff to keep a list of the names and addresses of everyone who came in to test drive a car. At the end of the month he sent surveys to the people who did not buy the car, asking them why. About one third of them returned the survey, with 44% of those indicating that they found a lower price elsewhere. Which is true?. i. The population of interest is all potential car buyers. ii. This survey design suffered from non-response bias. Check the best answer. a. Only I b. neither c. I and II d. Only II

Explanation / Answer

Ans:

8)This is an observational prospective study,as we are keeping record of their diets to see if any developed thyriod problems.

9)Statement I is not true.

As,population of interest is only people visting to that particular car dealership,not all potential car buyers.

Statement II is true,as only one third people responded.

So,answer will be only II.

Hence the option d is true.

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