Qnt 561 (Applied Business Research & Statistics) Entire Class

QNT 561 (Applied Business Research & Statistics) Entire Class

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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 we need to find the average of the two middle values.

Ordered data: 2.0, 2.1, 2.5, 2.8, 3.2, 3.7

Median = (2.5+2.8)/2 = 2.65

2.38

a. Mean = Sum/n = 85/10 = 8.5

b. Mean = Sum/n = 400/16 = 25

c. Mean = Sum/n = 35/45 = 0.778

d. Mean = Sum/n = 242/18 = 13.444

Week 1 Dq1:

How may variance and standard deviation be applied to a real-world business-related problem? Provide a specific application in which these measures are useful.

Week 1 Dq2

When would you use Chebyshev’s theorem and the empirical rule in business? How are they calculated? Provide one real-life example that requires Chebyshev’s theorem and one that requires the empirical rule.

Week 2

Assignments:

Business Research Methods Part I

Electronic books are becoming more popular because it offers portability, flexibility, larger capacity, and affordability. Barnes and Noble recognize the need to evaluate this change and therefore conduct a business research to determine the best approach to modify the business strategy. The learning team will determine an appropriate business research method to conduct a survey. The survey will be a series of questions from this organizational dilemma to this problem. Defining the problem will assist in determining an appropriate...