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# Compare the accuracy of the model using only useful predictors with the accuracy of the model using all five predictors?

INSTRUCTIONS TO CANDIDATES

1. Load in monthly house prices data in pounds sterling (£) from Jan 1991 to Dec 2016 from

monthlyHousePricesUK.csv and the FTSE100 index from Yahoo Finance (ticker = ^FTSE) over the

same period (01-Jan-1991 to 31-Dec-2016).

a) Using the FTSE100 index monthly returns as dependent variable and the house prices monthly returns as explanatory variable, create a regression model with MATLAB/Python

including a constant and calculate the correlation coefficient

b) What do the results tell us?

c) Use a hypothesis test to back up your conclusion about the existence of a significant relationship between these two variables.

2. The college.csv file contains information about different US colleges and universities. We are going to use the number of applications received, the number of enrolled students, the number of out of state students, the number of admitted students who were in the top 10% and number of admitted

students who were in the top 25% of their class to predict the graduation rate.

a) Calculate the correlation coefficients of the aforementioned variables.

b) Considering the graduation rate as the dependent variable, use stepwise to build the linear regression model.

c) Which predictor variables are useful in predicting the graduation rate? Explain how you got those variables.

d) Would the set of predictor variables be useful in predicting the graduation rate if you were to use BIC to select the model? Why?

e) Compare the accuracy of the model using only useful predictors with the accuracy of the model using all five predictors?

3. The bank of Israel has published the data for unemployment rate (per 100 Israeli workforces) from 1980-12-31 to 2013-09-02. Download the data from Quandl (code: ODA/ISR_LUR) into MATLAB/Python. Estimate the likely rate of unemployment by the year 2020 . Explain how one can evaluate the accuracy of the estimate and provide the accuracy as a percentage.

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