5 The following is sample data on oil wells drilled in 2005 and 2012, and shows the number of dry wells that were dug in comparison to total wells drilled. 2005 2012 Wells Drilled 119 162 Dry Wells 24 18 a Formulate the hypthesis test to test whether the wells drilled in 2005 were more likely to be dry than wells drilled in 2012. b What is the pValue of your hypothesis test at a 5% level of significance, and what is your conclusion? c What is the point estimate of the proportion of dry wells in 2005? d What is the point estimate of the proportion of dry wells in 2012? 6 A sample of 20 items provides a sample standard deviation of 5. 3 Compute interval estimates of the population variance at both 90% and 95% confidence level. I: Compute the interval estimate of the population SD at 95% confidence level. I: Test the following hypothesis at a 5% level of significance. Use both pvalue and critical value approaches. Hmz 5 20 H502 > 20