Researchers want to know if there is a strong relationship b…

Researchers want to know if there is a strong relationship between the creatine clearance of kidneys and the age of patients at a local hospital.  33 Patients were selected and a regression model was constructed to estimate the creatine clearance of kidneys based on age.  Use the information provided below to perform a complete test of utility for this model. Determine the ability of this model to estimate the creatine clearance of kidneys based on the age of a patient given the additional information about the model below: Use this model to estimate the average creatine clearance for all patients who are 60 years old.

An employee at a local tool supply store wants to convince c…

An employee at a local tool supply store wants to convince customers that the local budget tool is just as consistent as the reputable name brand tools.  The employee cut a length of aluminum stock to 2 inches in length and then randomly selected 10 name brand tools and 10 budget tools to measure the cut length.  The sample information below summarizes the findings of the experiment.  You may assume the measurements follow a normal distribution. Construct a 99% interval estimate for the ratio of the variance in measurement for these tools.  Is there reason to believe that the employee is correct in their claims?  Explain.