Suppose we have fitted a simple linear regression. We need to calculate the confidence interval
for the conditional mean of Y given x and the prediction interval of Y given x, which interval is
Prediction interval is wider
We have fitted a regression model, and the analysis of variance
(anova) table is given below:
Is the fitted regression a simple linear regression or m
1. If two random variables X and Y are following a standard bivariate normal distribution.
Are X and Y independent or dependent ?
They are independent.
2. Z=2X+3Y, E(X)=E(Y)=1, what is E(Z)?
3. Z=2X+3Y, Var(X)=1,Var(Y)=1, cov(X,Y)=0, what is Var(Z
Quiz 1 Jan. 28 (Wednesday)
Engineering Data Analysis
Instructions: write down all the steps that you have done to obtain your answers. You may not
get full credit even when your answer is correct without showing how