Compare these two studies in terms of the precision

Assignment Help Chemistry

Reference no: EM131099913

1.82 The concepts of accuracy and precision are not always easy to grasp. Here are two sets of studies: (a) The mass of a secondary weight standard is determined by weighing it on a very precise balance under carefully controlled laboratory conditions. The average of 18 different weight measurements is taken as the weight of the standard. (b) A group of 10,000 males between the ages of 50 and 55 is surveyed to ascertain relationship between calorie intake and blood cholesterol level. The survey questionnaire is quite detailed, asking the respondents about what they eat, smoke, drink, and so on. The results are reported as showing that for men of comparable lifestyles, there is a 40% chance of the blood cholesterol level being above 230 mg/dL for those who consume more than 40 calories per gram of body weight per day, as compared with those who consume fewer than 30 calories per
gram of body weight per day. Discuss and compare these two studies in terms of the precision and accuracy of the result in each case. How do the two studies differ in ways that affect the accuracy and precision of the results? What makes for high precision and accuracy in any given study? In each of these studies, what factors might not be controlled that could affect the accuracy and precision? What steps can be taken generally to attain higher precision
and accuracy?

Reference no: EM131099913

Questions Cloud

Using your textbook and the internet : Using your textbook and the Internet, tell us about an elective surgery you have read about. What are the risks of this surgery and do the risks outweigh the benefits? Would you undergo this surgery, why or why not?

How valuable you found the use of structured methodologies : I would like to know if any of you have ever used one and if so, for what problem set? I'd also be interested in getting your thoughts as to how valuable you found the use of structured methodologies to be.

Pedagogy-andragogy and gerogogy : In the last three sessions, we focused on the older adult as learner, learning needs and barriers, and the concept and practice of self-directed learning. We saw how self-directed learning theory grew from studying people who were self-educated.

Summary of current leadership strengths and development : IMPORTANT - go back and re-read the twelve (12) reflective summaries you have submitted for the (15) insight assessments you should have completed for Part A (each insight was related to a different leadership competency and/or aspect of leadershi..

Compare these two studies in terms of the precision : What steps can be taken generally to attain higher precision and accuracy?

Discuss how the company at hand can mitigate the tension : Discuss how the company at hand can mitigate the tension that you have identified between consumers' perceptions and the business practices involved. Do not use the bank example, but come up with your own example.

Relationship between private security agencies : Briefly summarize three key historical developments that have shaped the current status of the relationship between private security agencies and public law enforcement agencies. Discuss how these events impacted the primary functions of private s..

Describe macroeconomic issues such as the business cycle : Describe macroeconomic issues such as the Business Cycle. The article must be recent, in other words, dated within the beginning of the semester. I must be able to open the file to grade the assignment or the grade will be zero.

What is the time required to reach a conversion of 70 prcnt : what is the time required to reach a conversion of 70 percent?

User Account

All Pages