Q:

1.  
   1. Following is a histogram and a stem-and-leaf chart of the residuals. Does the normality assumption appear reasonable?

b.  Histogram of residual N  = 10     Stem-and-leaf of residual N = 10

c.                                    Leaf Unit  =  0.10

1.  
   1. Following is a histogram and a stem-and-leaf chart of the residuals. Does the normality assumption appear reasonable?

e.  Histogram of residual N  = 10     Stem-and-leaf of residual N = 10

f.                                    Leaf Unit  =  0.10

g.  Midpoint Count

h.       -1.5     1   *               1  -1  7

i.       -1.0     1   *               2  -1  2

j.       -0.5     2   **              2  -0

     -0.0     2   **              5  -0  440

1.  0.5     2   **               5   0  24

2.       1.0     1   *                3   0  68

3.       1.5     1   *                1   1

4.                                    1   1  7

Following is a plot of the fitted values of Y (i.e., Ŷ) and the residuals. Do you see any violations of the assumptions?

 Grafic

 

 

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