Using R:

Problem 5a: SLR model for Charges vs. Smoker

For the insurance data frame, use simple linear regression of charges against age for smokers (people with smoker = 1)

Assuming that the simple linear regression model is appropriate, find the p-value for a t-test of the null hypothesis that the regression coefficient for age as a predictor of charges for smokers is zero. -Round to 2 digits, like 1.23e-45

Problem 5b Based on the preceding t-test and p-value, what is the smallest significance level at which you would reject (or be indifferent between accepting and rejecting) the null hypothesis?