Question: I need an answer for 1.4 and 1.5 Please! thanks! 1.4. What is the estimated value of . 1.5. Use the histogram of residuals to

I need an answer for 1.4 and 1.5 Please! thanks!
1.4. What is the estimated value of
.
1.5. Use the histogram of residuals to comment on the normality of the error term in this ANOVA model.
Anova Question:
Four different designs for a digital computer circuit are being studied in order to compare the amount of noise present. Determine whether the amount of noise present is the same for all four designs based on the following data.
Data:

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