A large automobile insurance company selected samples of single and married male policyholders and recorded the number who made an insurance claim over the preceding three year period. Single Policyholders Married Policyholders ny, = 438 ny = 842 Number making claims = 63 Number making claims = 80 a. Use a = 0.05. Test to determine whether the claim rates differ between single and married male policyholders. z-value 2.81 0 (to 2 decimals) p-value 0.0050 o (to 4 decimals) We | can conclude v | ) that there is the difference between claim rates. b. Provide a 95% confidence interval (to 4 decimals) for the difference between the proportions for the two populations. Enter negative answer as negative number. ( 0.0104 @ 0.0872 @)