Intro Stats, Books a la Carte Edition (5th Edition)
5th Edition
ISBN: 9780134210285
Author: Richard D. De Veaux, Paul Velleman, David E. Bock
Publisher: PEARSON
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Chapter R, Problem 2.8RE
a.
To determine
Find the explanatory variable in the given situation.
b.
To determine
Plot a
Find the direction, form and strength of the scatterplot.
c.
To determine
Find the
d.
To determine
Find and interpret the value of
e.
To determine
Explain whether the analysis prove that powerboats are killing manatees.
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Students have asked these similar questions
Are Southern and Western states equally prone to fatal lightning strikes? The National Weather Service maintains a database that provides information on lightning strike
fatalities by state. The number of lightning strike fatalities from 2010 to 2014 for Southern and Western states are shown as follows. (National Weather Service website, April
2015). Use Table 1 of Appendix B.
Click on the datafile logo to reference the data.
DATA file
Southern State
Fatalities
Western State
Fatalities
AL
AZ
9.
AR
3
СА
3
FL
17
ID
1
GA
MT
1
KY
NM
1
LA
NV
MS
2
OR
1
NC
4
UT
4
OK
SC
1
WA
WY
TN
TX
8.
VA
Use a .05 and test to determine whether the distribution of lightning fatalities is the same for these two regions.
What is the mean and standard deviation of the normal distribution that can be used for this statistical test?
Mean (to nearest whole number)
4
Standard deviation (to 4 decimals)
3.8439
Is the scatterplot informative?
2) The projected number of navigation systems (in millions) installed in vehicles in North America, Europe and Japan from 2012 to 2016 are shown in the following table
Year
2012
2013
2014
2015
2016
Systems Installed
3.9
4.7
5.8
6.8
7.8
a) Draw a scatter diagram for this data. Use “Years since 2012” on the x-axis. Make sure the scatter diagram includes all required elements (axes labels, title, and appropriate scale)b) Use the points for 2013 and 2015 to find an equation of a line modeling this situationc) Use linear regression to find an equation of a line modeling this situationd) Use the equation in b to predict number of systems sold in 2018 and do this again for the equation in part c. What is the absolute and percentage difference between the two equations (use the equation in c as the base equation in the % calculation)e) Now use extrapolation using the last two data points to make a prediction for 2018f) Which method, in your opinion, is optimal to use in this case
Chapter R Solutions
Intro Stats, Books a la Carte Edition (5th Edition)
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