Activity 1 – Regression Analysis. MINITAB ASSIGNMENT Instructions: Select Graph
ID: 3390805 • Letter: A
Question
Activity 1 – Regression Analysis. MINITAB ASSIGNMENT
Instructions:
Select Graph -> Scatterplot… -> With Regression.
Enter Y and X variables names from your lists of values and click OK. Everytime i try to plug in the numbers for x and y, i get an error saying following input is not valid: y variable. the following is a number :8 please specify a single nontext column. How do i plug in my x and y's?
Click on the regression line. The tooltip will give you a regression equation. You can read the values of b0 and b1 from there as well.
For the plant emission data below for 11 potato plants, determine the following (write answers in provided sections):
PLANT WEIGHT (X) QUANTITY OF VOLATILE COMPOUNDS (Y)
In grams In hundreds of nanograms
57 8.0
85 22.0
57 10.5
65 22.5
52 12.0
67 11.5
62 7.5
80 13.0
77 16.5
53 21.0
68 12.0
Write the regression equation
Write the values of the constant b0 and slope b1
Predict the quantity of volatile compounds emitted by a potato
plant that weights 75 grams
Explanation / Answer
Sol)
The fitted Regression is
y=a+bx
Where x is weight and y is quantity
From excel
From above analysis
The fitted regression equation is
y=3.523 +0.1628 (weight)
B) Where intercept (bo)= 3.523
and slope(b1) =0.1628
C) when x=75
then y= =3.523 +0.1628 (75)
y=15.733
Coefficients Standard Error t Stat Intercept 3.523688 10.29948909 0.342123 weight 0.162848 0.154717015 1.052557Related Questions
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