Question: (10 marks). A study used two different types of method to measure the oxygen delivery level of 25 patients. The file data1_Q1.sav consists of two columns of data simulated to represent this information.

a. What are the means, variances and standard deviations of ‘method1’ and ‘method2’ oxygen delivery level? (2 marks).

b. Do box plots for ‘method1’ and ‘method2’. (2 marks).

c. Do the Q-Q plots for ‘method1’ and ‘method2’. (2 marks).

d. Produce 95% confidence intervals of the means for each method type (2 marks).

e. Do the two confidence intervals (obtained from d) overlap? How would you interpret this result (2 marks)?