The production of wine is a multibillion-dollar worldwide industry. In an attempt to develop a model of wine quality as judged by wine experts, data collected from red wine variants of Portuguese “Vinho Verdeâ€� wine. A sample of 50 wines is stored in VinhoVerde. Develop a simple linear regression model to predict wine quality, measured on a scale from 0 (very bad) to 10 (excellent), based on alcohol content ( % ) . a. Construct a scatter plot . For these a data, b 0 = − 0.3529 and b 1 = 0.5624. b. Interpret the meaning of the slope, b 1 , in this problem. c. Predict the mean wine quality for wines with a 10 % alcohol content. d. What conclusion can you reach based on the result of a − c ?
The production of wine is a multibillion-dollar worldwide industry. In an attempt to develop a model of wine quality as judged by wine experts, data collected from red wine variants of Portuguese “Vinho Verdeâ€� wine. A sample of 50 wines is stored in VinhoVerde. Develop a simple linear regression model to predict wine quality, measured on a scale from 0 (very bad) to 10 (excellent), based on alcohol content ( % ) . a. Construct a scatter plot . For these a data, b 0 = − 0.3529 and b 1 = 0.5624. b. Interpret the meaning of the slope, b 1 , in this problem. c. Predict the mean wine quality for wines with a 10 % alcohol content. d. What conclusion can you reach based on the result of a − c ?
The production of wine is a multibillion-dollar worldwide industry. In an attempt to develop a model of wine quality as judged by wine experts, data collected from red wine variants of Portuguese “Vinho Verde� wine.
A sample of 50 wines is stored in VinhoVerde. Develop a simple linear regression model to predict wine quality, measured on a scale from 0 (very bad) to 10 (excellent), based on alcohol content
(
%
)
.
a. Construct a scatter plot.
For these a data,
b
0
=
−
0.3529
and
b
1
=
0.5624.
b. Interpret the meaning of the slope,
b
1
,
in this problem.
c. Predict the mean wine quality for wines with a
10
%
alcohol content.
d. What conclusion can you reach based on the result of
a
−
c
?
Definition Definition Representation of the direction and degree of correlation in graphical form. The grouping of points that are plotted makes it a scatter diagram. A line can be drawn showing the relationship based on the direction of points and their distance from each other.
Please could you explain why 0.5 was added to each upper limpit of the intervals.Thanks
28. (a) Under what conditions do we say that two random variables X and Y are
independent?
(b) Demonstrate that if X and Y are independent, then it follows that E(XY) =
E(X)E(Y);
(e) Show by a counter example that the converse of (ii) is not necessarily true.
1. Let X and Y be random variables and suppose that A = F. Prove that
Z XI(A)+YI(A) is a random variable.
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