# Qnt 561 (Applied Business Research & Statistics) Complete Class - a+ Work

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QNT 561 (Applied Business Research & Statistics) Complete Class - A+ Work

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Week 1
Assignments:
QNT 561 Week 1 Practice Problems

Chapter 2 and 4
Name
QNT 561
June 18, 2012
Debasis Bhattacharya

Chapter 2 answers 2.37 Sample mean = (3.2+2.5+2.1+3.7+2.8+2.0)/6 = 16.3/6 = 2.717 The median is the middle value when the data set is ordered.
Here since we have even number of observations
…show more content…
Additionally, the research will provide a sample design to use for collecting data.
Week 2 Dq 1:
What are some examples of operational definitions in research design within your profession? For example, in the education field, graduation rate and retention rate are important operational definitions to measure progress of students. Likewise other professions have common metrics and definitions. Identify some metrics and operational definitions from your own career or a profession that you know well. Tell us why you think it is important!
Week 2 Dq 2:
What is the purpose of sampling? What are some concerns and dangers of sampling? How important is the sample design to data validity? Explain. Provide an example where a sample might misrepresent data validity. For example, reflect on the current political campaign and the pollsters! QNT 561 Week 2 Practice Problems
Ch. 4 of Statistics for Business and Economics

4.156

Answer for part (a) and (b) Sample Sample mean
0, 0 0
0, 2 1
0, 4 2
0, 6 3
2, 0 1
2, 2 2
2, 4 3
2, 6 4
4, 0 2
4, 2 3
4, 4 4
4, 6 5
6, 0 3
6, 2 4
6, 4 5
6, 6 6

c. Each sample has an equal probability to be selected. There are 16 samples. Hence the probability of selecting a sample is

d. Sampling distribution of the sampling mean. Sample mean P(
0 1/16
1 1/8
2

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