Concept explainers
Medical research often involves blind and double-blind testing. Explain what these two terms mean.
To explain: The blind and double-blind testing.
Answer to Problem 2UA
Answer:
Explanation of Solution
Given info:
The study based on the pharmaceutical company has applied for the approval to market a new arthritis medication.
Justification:
Blind:
Blinding is the process in which either the experimenter or the subjects or both of them do not have any knowledge about the treatment administered to them.
Each subject in the study must be provided in random order with one group of ‘Medication” and one group of ‘Placebo’. Then the effect of medication on each subject should be noted. In this study, the experimenter does not have the knowledge about which subjects are given to medication and which subjects are given to placebo.
Double blinding:
Double blinding is a phenomenon where both the experimenter who administered the treatment and the subject that receives the treatment would not have any prior knowledge about the treatment given for medication.
The experiment can be conducted by using double blinding. The researcher who is administering the treatments should not have any knowledge for which group which treatment is assigned. Likewise, the participant in the study also should not have any knowledge of which treatment (Medication or Placebo) is given to them.
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Chapter 8 Solutions
Elementary Statistics: Picturing the World (6th Edition)
- Cholesterol Cholesterol in human blood is necessary, but too much can lead to health problems. There are three main types of cholesterol: HDL (high-density lipoproteins), LDL (low-density lipoproteins), and VLDL (very low-density lipoproteins). HDL is considered “good” cholesterol; LDL and VLDL are considered “bad” cholesterol. A standard fasting cholesterol blood test measures total cholesterol, HDL cholesterol, and triglycerides. These numbers are used to estimate LDL and VLDL, which are difficult to measure directly. Your doctor recommends that your combined LDL/VLDL cholesterol level be less than 130 milligrams per deciliter, your HDL cholesterol level be at least 60 milligrams per deciliter, and your total cholesterol level be no more than 200 milligrams per deciliter. (a) Write a system of linear inequalities for the recommended cholesterol levels. Let x represent the HDL cholesterol level, and let y represent the combined LDL VLDL cholesterol level. (b) Graph the system of inequalities from part (a). Label any vertices of the solution region. (c) Is the following set of cholesterol levels within the recommendations? Explain. LDL/VLDL: 120 milligrams per deciliter HDL: 90 milligrams per deciliter Total: 210 milligrams per deciliter (d) Give an example of cholesterol levels in which the LDL/VLDL cholesterol level is too high but the HDL cholesterol level is acceptable. (e) Another recommendation is that the ratio of total cholesterol to HDL cholesterol be less than 4 (that is, less than 4 to 1). Identify a point in the solution region from part (b) that meets this recommendation, and explain why it meets the recommendation.arrow_forwardWhat is an experiment?arrow_forwardAnother friend asks you to explain how to tell whether two events are dependent or independent. How would you reply? Use your own words.arrow_forward
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