Refer to Exercise 13.52. The data for public servants’ sick days 5 years ago was also recorded. Is there sufficient evidence to conclude that there are more sick days this year than 5 years ago? Use a 5% significance level for all tests. Use a 95% confidence level for all estimates.

In exercise 13.52

Are Canadian public servants gaming the system by taking more sick days than do private sector workers? To answer the question Statistics Canada took a random sample of white-collar  private sector workers and recorded the number of sick days each took in the previous 12 months. Is there enough statistical evidence to infer that white-collar public servants take more sick days than do white-collar private sector workers?