filecrime.csv. is given in the puctures below.

It has two columns, one of which is the percentage ofindividuals in the county with at least a high-school diploma (columndip), and the other is the crimerate per 100,000 residents for the counties (columnrate). Consider Y to be crime rate, and X to bepercentage with high school diploma. Use R to complete the following tasks:

(a) Plot a scatter plot of Y and X, being sure to label the axes and give a main title.

(b) Calculate the estimated regression line.

(c) Interpret the slope and intercept (if appropriate) in terms of the problem.

(d) Does there appear to be outliers in the plot from (a)? If so, identify them in R (for example, listthe pair (X,Y) that are outliers, or equivalently the row).

(e) Create a QQ plot (normal probability plot) of the residuals. Does it appear that they are normallydistributed? Explain.

(f) Create a plot of the errors vs. the fitted values (Yis). Does it appear the variance of the errorsis constant? Explain.

(g) Find the 95% confidence interval for the slope, and interpret it in terms of the problem. Doesthe interval suggest there is a significant linear relationship? Explain.

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