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# Analysis with Correlation and Regression item options

1.cenario
According to the U.S. Geological Survey (USGS), the probability of a magnitude 6.7 or
greater earthquake in the Greater Bay Area is 63%, about 2 out of 3, in the next 30
years. In April 2008, scientists and engineers released a new earthquake forecast for
the State of California called the Uniform California Earthquake Rupture Forecast
(UCERF).
As a junior analyst at the USGS, you are tasked to determine whether there is
sufficient evidence to support the claim of a linear correlation between the
magnitudes and depths from the earthquakes. Your deliverables will be a
PowerPoint presentation you will create summarizing your findings and an excel
Concepts Being Studied
o Correlation and regression
o Creating scatterplots
o Constructing and interpreting a Hypothesis Test for Correlation using r as the
test statistic
You are given a spreadsheet that contains the following information:
o Magnitude measured on the Richter scale
o Depth in km
Using the spreadsheet, you will answer the problems below in a PowerPoint
presentation.
What to Submit
The PowerPoint presentation should answer and explain the following questions
based on the spreadsheet provided above.
o Slide 1: Title slide
o
Slide 2: Introduce your scenario and data set including the variables
provided.
o
Slide 3: Construct a scatterplot of the two variables provided in the
spreadsheet. Include a description of what you see in the scatterplot.
o
Slide 4: Find the value of the linear correlation coefficient r and the critical
value of r using α = 0.05. Include an explanation on how you found those
values.
o
Slide 5: Determine whether there is sufficient evidence to support the claim
of a linear correlation between the magnitudes and the depths from the
earthquakes. Explain.
o
Slide 6: Find the regression equation. Let the predictor (x) variable be the
magnitude. Identify the slope and the y-intercept within your regression
equation.
o
Slide 7: Is the equation a good model? Explain. What would be the best
predicted depth of an earthquake with a magnitude of 2.0? Include the
correct units.
o
Slide 8: Conclude by recapping your ideas by summarizing the information
presented in context of the scenario.
which shows all calculations.
MAG DEPTH
0,66
7,5
0,74
2,5
0,64
14,0
1,20
15,5
0,70
3,1
2,20
2,4
1,98
14,4
0,64
5,7
1,22
6,1
0,55
7,1
1,58
17,1
1,26
8,7
3,55
9,3
0,90
12,3
1,76
9,8
0,22
7,4
2,80
17,1
0,01
8,8
0,65
5,0
1,46
19,1
1,62
12,7
1,82
4,7
0,99
6,8
1,56
6,1
0,40
14,6
1,28
4,9
0,83
19,1
1,34
9,9
0,54
16,1
1,25
4,6
0,93
4,9
1,25
16,3
0,79
14,0
0,79
4,2
1,44
5,5
1,00
5,9
2,24
15,6
2,50
7,7
1,79
16,4
1,25
15,4
1,49
4,9
0,84
8,1
1,42
7,5
1,00
14,1
1,25
11,1
1,43
14,8
1,35
4,6
1,45
7,1
0,40
3,2
1,39
5,3
*Note: Refer to the deliverable instructions for a breakdown of the PowerPoint requirem
Slide 3. Construct a Scatterplot Below.
Slide 4. Find the value of the linear correlation coefficient r and the critical value of
Include an explanation on how you found those values.
r
CV
Slide 6. Find the regression equation. Let the predictor (x) variable be the magnitude. Iden
slope and the y-intercept within your regression equation.
Slope
Y-intercept
Regression Equation
Slide 7. Is the equation a good model? Explain. What would be the best predicted depth o
earthquake with a magnitude of 2.0? Include the correct units.
*Hint: You only need to find y-hat or y-bar (not both).
y-hat
y-bar
n of the PowerPoint requirements.
and the critical value of r using α = 0.05.
ariable be the magnitude. Identify the
be the best predicted depth of an

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