3.In 2005, Health Canada claimed that 16.6% of Canadian adults are obese. A researcher wanted to check whether this percentage has increased in 2009. He randomly selected 185 Canadian adults and found 35 of them are obese. He wants to develop a 91% confidence interval for the obese percentage in 2009. Write down the critical value

6.In 2005, Health Canada claimed that 16.4% of Canadian adults are obese. A researcher wanted to check whether this percentage has changed in 2009. He randomly selected 120 Canadian adults and found 17 of them are obese. Use 3% significance level. Write down the value of the test statistic (give your answer to 3 decimal places)

15.A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in 2009 compared to 2005. He used Health Canada data. He randomly selected 80 Canadian adults from 2005 data and found 13 of them are obese; In a random sample of 55 Canadian adults from 2009 data, he found 7 of them are obese. He wants to develop a 89% confidence interval for the change is obese percentage. Let population1 be 2005 data and population2 be 2009 data. Write down the critical value.