Question

NEED HELP ASAP! Thank you in advance!!

For Question D) it was asking which technique for gathering data (sampling, experiment, stimulation or census) do you think was used in the following studies?

d) An Australian study included 588 men and women who already had some precancerous skin lesions. Half got a skin cream containing a sunscreen with a sun protection factor of an inactive cream. After 7 months, those using the sunscreen with the sun protection had new precancerous skin lesions (New England Journal ofMedicine.), 17; half got fewer 10) The New York Times did a special report on polling that was carried in papers across the nation. The article pointed out how readily the results of a survey can be manipulated. Some features that can influence the results of a poll include the following: responses, the phrasing of the questions, the sampling techniques used (voluntary response or sample designed to be representative), the fact that words may mean different things to different people, the questions that precede the question of interest, and finally, the fact that respondents can offer opinions on issues they know nothing about. the number of possible a) Consider the expression "over the last few years." Do you think that this expression means the same time span to everyone? What would be a more precise phrase? b) Consider this question: "Do you think fines for running stop signs should be doubled?" Do you think the response would be different if the question "Have you ever run a stop sign?" preceded the question about fines? c) Consider this question: "Do you watch too much television?" What do you think the responses would be if the only responses possible were yes or no? What do you think the responses would be if the possible responses were "rarely,>" "s or "frequently"? ometimes,"

Answer 1

In the question (d) ,

Experimental Design is used because

in experimental design,

variables of interest are identified which is here "588 men and women" .

The variables of interest are used here so that data may be obtained how the factors ,

which here in above question are "cream containing sunscreen and inactive cream" influence the other variable

which is referred to as "Response variable" ,and in above question

it is that "the sun protection had fewer new precancerous skin lesions" .

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Just for more clearance ,let us take an example:

Consider an experiment designed to determine the effect of three exercises for certain duration on cholesterol level of patients .

Here, Each patient is variable of interest.

Response variable is the change in cholesterol level of patients after completion of exercises in a certain duration .

Factors are the three exercises which effects on cholesterol level

and the method of experiment design is widely used in fields of agriculture, Biology, Marketing research, industrial production and Medicine ,