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Problem 1
A researcher is interested in evaluating whether there is a relationship between number of packs of cigarettes smoked per day and longevity (in years). n=10.
# packs of cigarettes smoked (X)
Longevity (Y)
0
80
70
1
72
2
68
65
3
69
60
4
58
55
1. Evaluate the correlation coefficient.
2. Evaluate the coefficient of determination
3. Evaluate the regression coefficient b_{1}
4. Evaluate the regression coefficient b_{0}
5. The regression equation
6. Excel regression analysis
Problem 2: A researcher is interested in determining whether there is a relationship between advertising and sales for her firm.
advertising in $thousands(X)
Sales in millions(Y)
5
6
7
8
10
11
12
Problem 3:
A researcher is interested in determining whether there is a relationship between price and quantity demanded for her firm.
Price(X)
Q-demanded(Y)
95
90
78
71
9
50
44
Problem 4:
A researcher is interested in determining whether there is a relationship between grades and hours studied for statistics.
Hours studied(X)
Grade on final(Y)
20
25
40
62
83
For homework consider the points (0,0), (1,2), (2,3), (3,9), ( 4,17), (5,24), (6,37). (1) Use Matlab to find the least squares best fit with a line. Turn in A, y and c and a plot like the one above. Also (2) use Matlab to find the least square best..
Calculate the correlation coefficient
Consider the problem of operating a warehouse, by buying and selling the stock of a certain commodity, in order to maximize profit over four periods.
Create a multi-threaded competition
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The American patent system was based on the presumption that social welfare coincided with the individual welfare of inventors
Create a simple Web Application that collects gradings under a number of criteria, and then calculates an aggregate mark
Drag in course concepts and ideas from the various texts and lectures as frequently and cleverly as you can. Question.
What can we say about the shape of the distribution of the sample mean?
How can the conventional financial accounting system be made to serve the purpose of operational control
Binge drinking and alcohol-related behaviours amongst Pacific youth: a national survey of secondary school students
What is the probability of winning a prize in an office sweep
Identify sample, population, sampling frame (if applicable), and response rate (if applicable). Describe sampling technique (if applicable) or experimental design
Calculate the expected value, variance, and standard deviation of the total income
Regression analysis techniques
Locate the original poll, summarize the poling procedure (background on how information was gathered), the sample surveyed.
Evaluate the expected value of the total number of sales
Accepting Manipulation or Manipulating
Find the probability of given case.
Data Analysis and Statistical Modeling for Business
The researchers used the available survey data and summarised the nature of the car accidents and if a mobile phone was being used by the driver either during (or immediately before) the accident
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