A bank finds that the estimated proportion of clients defaulting on a loan, give

emancipezN

emancipezN

Answered question

2021-09-08

A bank finds that the estimated proportion of clients defaulting on a loan, given the interest rate is below 15%, is 0.34, They also find that the estimated proportion of clients defaulting on a loan, given the interest is greater than or equal to 15%, is 0.52.
a) What is the odds ratio of defaulting given the interest rate is greater than or equal to 15% relative to the interest rate is lower than 15%? Interpret this odds ratio.
b) If we were to analyze this data using the following logistic regression model, what are the estimates of β0 and β1? Show your work.
lg{(p1p)}=β0+β1x
Where p is the probability of defaulting on a loan and x is an indicator variable that is 1 when the interest rate is greater than or equal to 15% and 0 when the interest rate is less than 15%.

Answer & Explanation

Aubree Mcintyre

Aubree Mcintyre

Skilled2021-09-09Added 73 answers

SOLUTION: we translate data into tabular formate.
CasesContolDefaultingnonDefaultingexposed<15%0.340.66unexposed15%0.520.48
a) What is the odds ratio of defaulting given the interest rate is greater than or equal to 15% relative to the interest rate is lower than 15%? Interpret this odds ratio.
ANS: odds of defaulting given interest rate 1515% is odd1=(0.520.48)=1.083
odds of defaulting given interest rate <15% is odd1=(0.340.66)=0.5151
SO odds ratio is given by,
addratio=odds1odds20=1.0830.5151=2.1025
Interpretation: odds of defaulting given interest rate 1515% is greater than odds of defaulting given interest rate <15%, that is high intereset rate 1515% may be a risk factor for defualting a loan.
b) If we were to analyze this data using the following logistic regression model, what are the estimates of β0 and β1? Show your work.
lg{(p1p)}=β0+β1x
ANS:
where bl and bo are b1=log (base catergory) and b1=log (odd ratio)
bo=log (odds of defaulting given interest rate 1515%=log(1.083)=0.03462
b1=log (oddratio of defaulting given interest rate 1515% relative to the defaulting given interest rate <15%=log(2.1025)

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