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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 b1
4. Evaluate the regression coefficient b0
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
Evaluate the expected value of the total number of sales
Obtain a time-series plot and correlogram of the residuals from (9) and comment on them with regard to the violation of classical assumptions. Test for fourth-order autocorrelation using the Breusch-Godfrey procedure
What is the probability of winning a prize in an office sweep
Find the probability that exactly 15 babies are female and find the probability that no more than 12 babies are female.
Westhouser believes that it on make $650.000 from alternative Investments. What should the company do - houscr does not take advantage of Its current op-don, it can attempt to buy the land at the beginning of June or the beginning of July. provided ..
allelectronics caries 1000 products p1 . p1000. consider customers ada bob and cathy such that ada and bob purchase
Find the relation of question with some of the factors you think important as motivators of choosing the medical profession. Why do you choose these factors?
How much of each product do you recommend be produced that you believe maximizes revenue? How much revenue would be made if they followed your recommendation?
Frequency distribution from part a: Find the mean, variance and stand excldeviation and using the frequency distribution from parta: What is the probability of a randomly selected herb to have a height of at least 17 inches?
Define the hypothesis and find the standard error of the difference in the means also find the test statistic - Determine the required sample size to be able to use a 99% confidence interval.
What research design was used this study
1. listed below are the numbers of people executed in the united states from 1976 nbsp to 1994. in 1976 the u.s.
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