Complete the following – Essay Furious


· 
20.19 Xr20-19 Plot the following time series to
determine which of the trend models appears to fit better.

Period

1

2

3

4

5

Time
Series

55

57

53

49

47

Period

6

7

8

9

10

Time
Series

39

41

33

28

20

· 
20.35 The following trend line and seasonal indexes were computed
from 4 weeks of daily observations. Forecast the 7 values for next
week.  = 120 + 2.3t t
= 1, 2, … , 28

Day

Seasonal Index

Sunday

1.5

Monday

.4

Tuesday

.5

Wednesday

.6

Thursday

.7

Friday

1.4

Saturday

1.9

17.39Refer to Exercise 17.16.
Calculate the correlation between the father’s and the mother’s years of
education. Is there any sign of multicollinearity? Explain.

· 
Perform the Durbin–Watson test at the
5% significance level to determine whether positive first-order autocorrelation
exists when d = 1.10, n = 25, and k = 3.

· 
17.42 Refer to Exercise 17.20.

o  a. Calculate the correlation matrix.

o  b. Are there signs of the presence of
multicollinearity? Explain.

o  c. Test the correlation between each
independent variable and the dependent variable. Which independent variables
are linearly related to the dependent variable?

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