Determine whether the study is an observational study or an experimental study. 47. Researchers wanted to know if chemical pesticides were more effective than non-chemical bug traps at controlling pests for crop farmers. The researcher treated one field with chemical pesticides and placed bug traps in another field. They compared the results. 48. In 2001, a report in the Journal of the American Cancer Institute indicated that women who work nights have a 60% greater risk of developing breast cancer. Researchers based these findings on the work histories of 763 women with breast cancer and 741 women without the disease. 49. A medical facility performed a study on pain relief for their patients. For patients who were in pain, they administered a high dosage of a certain pain medication to half of the patients and a low dosage of the same medication to the other half. The patients who received the high dosage reported much greater pain relief than the low dosage patients. 50. A farmer wanted to know which fertilizer yielded a better crop. He used one type of fertilizer, fertilizer A, on half of his crops and another type, fertilizer B, on the other half. At the end of the season the crops that had received fertilizer A had a higher yield. Choices for 47-50: A) Observational study B) Experimental study
Determine whether the study is an observational study or an experimental study. 47. Researchers wanted to know if chemical pesticides were more effective than non-chemical bug traps at controlling pests for crop farmers. The researcher treated one field with chemical pesticides and placed bug traps in another field. They compared the results. 48. In 2001, a report in the Journal of the American Cancer Institute indicated that women who work nights have a 60% greater risk of developing breast cancer. Researchers based these findings on the work histories of 763 women with breast cancer and 741 women without the disease. 49. A medical facility performed a study on pain relief for their patients. For patients who were in pain, they administered a high dosage of a certain pain medication to half of the patients and a low dosage of the same medication to the other half. The patients who received the high dosage reported much greater pain relief than the low dosage patients. 50. A farmer wanted to know which fertilizer yielded a better crop. He used one type of fertilizer, fertilizer A, on half of his crops and another type, fertilizer B, on the other half. At the end of the season the crops that had received fertilizer A had a higher yield. Choices for 47-50: A) Observational study B) Experimental study
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
47,48,49,50
Transcribed Image Text:Determine whether the study is an observational study or an experimental study.
47. Researchers wanted to know if chemical pesticides were more effective than non-chemical
bug traps at controlling pests for crop farmers. The researcher treated one field with chemical
pesticides and placed bug traps in another field. They compared the results.
48. In 2001, a report in the Journal of the American Cancer Institute indicated that women who
work nights have a 60% greater risk of developing breast cancer. Researchers based these
findings on the work histories of 763 women with breast cancer and 741 women without the
disease.
49. A medical facility performed a study on pain relief for their patients. For patients who were
in pain, they administered a high dosage of a certain pain medication to half of the patients and
a low dosage of the same medication to the other half. The patients who received the high
dosage reported much greater pain relief than the low dosage patients.
50. A farmer wanted to know which fertilizer yielded a better crop. He used one type of
fertilizer, fertilizer A, on half of his crops and another type, fertilizer B, on the other half. At the
end of the season the crops that had received fertilizer A had a higher yield.
Choices for 47-50:
A) Observational study
B) Experimental study
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