You want to determine if eating more fruits reduces a person’s chance of developing cancer. You...

You want to determine if eating more fruits reduces a person’s chance of

developing cancer. You watch people over the years and ask them to tell you how

many servings of fruit they eat each day. You then record who develops cancer.

Is this an observation or an experiment? Why?

Solutions

Expert Solution

Here in this situation You watch people over the years and ask them to tell you how many servings of fruit they eat each day. Is this an observation or an experiment.

The main difference between observation and experiment have to discuss.

An the observational studies the researchers don't interfere on the way the data is collected. They merely observe,such as in an investigation of how regularly studying improves marks,the researchers sample people from the population who studied regularly and those who didn't and then collected the average marks obtained by each group.

Whereas in an Experiment the researchers interfere on how data are collected. In experiment each case or subject is randomly assigned to treatment groups,that is to say each subject have an equal chance of being in both the groups. Such studies help us to establish casual connections between the response variable and explanatory variables because even if there exists any confounding variable,random assignment makes sure that they are equally likely spread in both the groups.

To sum up, the main difference between observational studies and experiment is that in observational study there is no random assignment whereas in experiment there is random assignment.

So obviously this is an observation not an experiment. Here there is no randomness for collecting data.

orchestra answered 1 year ago

Next > < Previous

Related Solutions

Which of the following is a major concern for women? A. Higher chance of developing more...

Which of the following is a major concern for women? A. Higher chance of developing more acute and chronic illnees B. poorer health outcomes C. greater morbidity D. all of the above

Need Chi-Square Test for Independence to determine if eating healthy and exercising reduces diastolic blood pressure....

Need Chi-Square Test for Independence to determine if eating healthy and exercising reduces diastolic blood pressure. Day BP Diastolic Ate Healthy and Exercised 1 85 N 2 109 N 3 96 N 4 92 N 5 99 N 6 98 N 7 102 Y 8 93 N 9 90 Y 10 84 N 11 90 N 12 86 N 13 81 N 14 77 Y 15 90 Y 16 86 Y 17 83 N 18 80 Y 19 78 N...

Could you work towards cancer prevention by enhancing your diet by using phytochemical, fruits & vegetables?...

Could you work towards cancer prevention by enhancing your diet by using phytochemical, fruits & vegetables? or by vitamins, mineral, or fibers? What are your thoughts on these? Debate if they can really help or they are just hype by providing scientific evidence for your argument/s.

As an engineer working for Thomson Pharmaceutical, you are in charge of developing a new cancer...

As an engineer working for Thomson Pharmaceutical, you are in charge of developing a new cancer drug. The new drug is to be used as a supplement to a well established, currently used drug to reduce tumor sizes in lung cancer patients. Previous studies have shown that the currently-used drug results in an average reduction in tumor mass of 38.7% after 8 weeks of use. To study the effects of the new supplement, you had 16 patients who were given...

Consider that you have designed an ergonomic chair that reduces back strain. You want the top...

Consider that you have designed an ergonomic chair that reduces back strain. You want the top price for your high-quality product. Discuss what can be done to ensure that customers will buy at the higher-end price.

1. Describe how you can make mealtime more conducive to eating and more pleasant for the...

1. Describe how you can make mealtime more conducive to eating and more pleasant for the patient. 2. What can you do to help increase nutritional intake for the patient with a limited appetite? 3. Why is ensuring intake and output balance pertinent? 4. Describe the differences between a clear liquid and full liquid diet. 5. Explain what “advance as tolerated” means in relation to a diet order. 6. Why is it important to educate patients about potential food–drug interactions?

You want to buy 100 shares of XYZ stock, and you don't want to pay more...

You want to buy 100 shares of XYZ stock, and you don't want to pay more than $20 per share for it. Which option strategy would be the least expensive? Use letters in alphabetical order to select options A Buy one XYZ 20 call for $2. B Sell one XYZ 20 call for $4. C Buy one XYZ 20 put for $1. D Sell one XYZ 20 put for $3. You want to set up a covered call position on...

Put yourself in an older person’s shoes. Imagine you are carrying out an everyday activity such as reading, eating, or talking when a nurse informs you that you must come with them.

Read the reflection, then answer the questions that follow.Put yourself in an older person’s shoes. Imagine you are carrying out an everyday activity such as reading, eating, or talking when a nurse informs you that you must come with them. Another person tells you they are about to push you, which they do. This person then instructs you to walk in a straight line. After that, you are expected to stand and then march with your eyes shut. At the...

You want to know if, on average, households have more cats or more dogs. You take...

You want to know if, on average, households have more cats or more dogs. You take an SRS of 8 households and find the data below: # of cats # of dogs 2 1 0 1 3 3 2 4 0 0 4 2 0 2 2 1 A) Determine the population(s) and parameter(s) being discussed. B) Determine which tool will help us find what we need (one sample z test, one sample t test, two sample t test, one...

You are developing primers for a wildlife forensic case and want to identify both species and...

You are developing primers for a wildlife forensic case and want to identify both species and distinguish between individuals. a) For which type of analysis would you want to develop/use degenerate primers? Why? b) If the primer you developed for species ID is 14bp, the mitochondrial genome is 18500 bp, and the nuclear genome is 3.2x109 bp, how many times would you expect it to bind to each of the respective genomes assuming the same primer could bind to both...

Subjects