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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
Examine statistical data consisting of records of car accidents on Victorian roads and freeways in 2012
Binge drinking and alcohol-related behaviours amongst Pacific youth: a national survey of secondary school students
Locate the original poll, summarize the poling procedure (background on how information was gathered), the sample surveyed.
Research paper examines determine the impact of social media use on student learning.
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
What level of evidence does this study design represent?
What can we say about the shape of the distribution of the sample mean?
What is the probability of winning a prize in an office sweep
Please read through the case scenario shown below to gain an understanding of the background information and the research study
What is the probability in the sample?
Describe the population of interest for the survey
Identify sample, population, sampling frame (if applicable), and response rate (if applicable). Describe sampling technique (if applicable) or experimental design
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