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 71 - 600 12 - 900 Number making claims = 126 Number making claims = 144 a. Use o = 0.05. Test to determine whether the claim rates differ between single and married male policyholders. z-value X (to 2 decimals) p-value (to 4 decimals) We can conclude 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