Using the accompanying Accounting Professionals data to answer the following questions.   a. Find and interpret a 90​% confidence interval for the mean years of service. b. Find and interpret a 90​% confidence interval for the proportion of employees who have a graduate degree.    view the Accounting Professionals data. Employee    Years of Service    Graduate Degree?1    26    Y2    8    N3    10    N4    6    N5    23    N6    5    N7    8    Y8    5    N9    26    N10    14    Y11    10    N12    8    Y13    7    Y14    27    N15    16    Y16    17    N17    21    N18    9    Y19    9    N20    9    N     Question content area bottom Part 1 a. A 90​% confidence interval for the mean years of service is   ​(Use ascending order. Round to two decimal places as​ needed.)

​If, based on a sample size of 900​,a political candidate finds that 509people would vote for him in a​ two-person race, what is the 95​%confidence interval for his expected proportion of the​ vote? Would he be confident of winning based on this​ poll?       Question content area bottom Part 1 A 9595​% confidence interval for his expected proportion of the vote is   ​(Use ascending order. Round to four decimal places as​ needed.)

Questions An insurance company's cumulative incurred claims for the last 5 accident years are given in the following table: Development Year Accident Year 0 2018 1 2 3 4 245 267 274 289 292 2019 255 276 288 294 2020 265 283 292 2021 263 278 2022 271 It can be assumed that claims are fully run off after 4 years. The premiums received for each year are: Accident Year Premium 2018 306 2019 312 2020 318 2021 326 2022 330 You do not need to make any allowance for inflation. 1. (a) Calculate the reserve at the end of 2022 using the basic chain ladder method. (b) Calculate the reserve at the end of 2022 using the Bornhuetter-Ferguson method. 2. Comment on the differences in the reserves produced by the methods in Part 1.