Question 1:
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
wider?
Prediction interval is wider
Question 2:
A

Quiz 2015/04/06
We have fitted a regression model, and the analysis of variance
(anova) table is given below:
source
Regression
Error
total
DF
2
12
14
SS
2510.5
?
?
MS
?
13.4
F
?
P
0.00
Question (1)
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)?
E(Z)=5.
3. Z=2X+3Y, Var(X)=1,Var(Y)=1, cov(X,Y)=0, what is Var(Z

Name:_
IE: 4250
Quiz 1 Jan. 28 (Wednesday)
Access ID:_
Engineering Data Analysis
Winter 2015
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