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In: Statistics and Probability

True or False 1. People with diabetes are at higher risk for certain cancers than those...

True or False

1. People with diabetes are at higher risk for certain cancers than those without diabetes suggests a new study based on a telephone survey of nearly 400,000 adults. This is an example of an observational study.

2. In New York City, there are 3250 walk buttons that pedestrians can press at traffic intersections, and 2500 of them do not work. This is an example of a statistic.

3. In New York City, there are 3250 walk buttons that pedestrians can press at traffic intersections, and 2500 of them do not work. This is an example of discrete data.

4. A group of students is divided into two groups. One group is given a new chewable vitamin and the other group is given a placebo. After six months they are asked to fill out a questionnaire and given a health exam to see if the new vitamin has health benefits that are better than a placebo. This is an experimental study.

Solutions

Expert Solution

1.

People with diabetes are at higher risk for certain cancers than those without diabetes suggests a new study based on a telephone survey of nearly 400,000 adults. This is an example of an observational study.

Answers: Here researcher did not give any treatment to any subject so it is an observational study.

Hence, it is true.

2:

In New York City, there are 3250 walk buttons that pedestrians can press at traffic intersections, and 2500 of them do not work. This is an example of a statistic.

This is data for whole New York City not for sample so it is parameter.

Hence, it is false.

3:

In New York City, there are 3250 walk buttons that pedestrians can press at traffic intersections, and 2500 of them do not work. This is an example of discrete data.

Yes it is discrete data because number of walk buttons are countable.

Hence, it is true.

4:

A group of students is divided into two groups. One group is given a new chewable vitamin and the other group is given a placebo. After six months they are asked to fill out a questionnaire and given a health exam to see if the new vitamin has health benefits that are better than a placebo. This is an experimental study.

Answers: Here researcher gave any treatments to subject so it is an experimental study.

Hence, it is true

orchestra answered 2 years ago
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