By NEAS - 8/6/2018 4:34:47 PM
MS Module 18 Units of measurement practice exam questions
(The attached PDF file has better formatting.)
An actuary in the United States uses least squares regression with N pairs of observations (Xi, Yi) to estimate average annual claims cost in dollars per average distance driven per day in miles, giving
annual claim costs (Y) in dollars = β0 + β1 × distance driven (X) in miles + ε, with β0 = 70 and β1 = 13.1
A European actuary changes the parameters to annual claims costs in Euros and distance driven per day in kilometers. Assume one Euro = 1.66 dollars and 1 kilometer = 0.625 miles.
Question 18.1: β0
What is β0 in the European actuary’s regression equation?
Answer 18.1: 70 / 1.66 = 42.17
($70 = €42.17)
Question 18.2: β1
What is β1 in the European actuary’s regression equation?
Answer 18.2: 13.1 × 0.625 / 1.66 = 4.93
(13.1 (dollars/mile) × (0.625 miles per kilometer) / (1.66 dollars per Euro) = 4.93 (Euros/kilometer) )