Statistics / regression / statcrunch, statistics homework help

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Question Description

solve regression analysis

Statistics / regression / statcrunch, statistics homework help
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Geontiry
School: Cornell University

Hello! Find herein attached word document detailing the answer to your question. Please may you feel free to seek clarification and a follow up whenever possible.

SOLUTIONS
Question 1
a) There seems to be a negative correlation. This is because the increase in one variable
results to the decrease of the other variable as shown by the negative slope of the
correlation line.
b) Given the regression equation as 𝑦 = 0.95 βˆ’ 1.67π‘₯;
Then, when x =

0.5mol
kg

;

𝑦 = 0.95 βˆ’ 1.67π‘₯ = 0.95 βˆ’ 1.67 𝑋 0.5 = 0.95 βˆ’ 0.835 = 0.115 ℃
c) The linear regression seems appropriate. This is based on the correlation coefficient and
the fit of the linear regression line for the data.
d) When coefficient of determination is 19%, the correlation is given as:
πΆπ‘œπ‘Ÿπ‘Ÿπ‘’π‘™π‘Žπ‘‘π‘–π‘œπ‘› π‘π‘œπ‘’π‘“π‘“π‘–π‘π‘–π‘’π‘›π‘‘, π‘Ÿ = ...

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