1. The following quantities have been calculated over a sample of 10 observations

y=62, x=125, x2=1619, xy=810, y2=412, e2=5.9186

I=1 for every sample

(a) Compute the least squares regression coefficients

(x'x)^-1 = ( 2.865 - 0.22 )

(-0.22 0.017)

(c) Compute theR2and interpret it

(d)Present the assumptions needed to make b a consistent estimator for?

(e)Derive the variance under the homoskedasticity assumption and discuss the consequences of its viola- tion. Is the OLS estimator still unbiased?