The concentration of an additive in a Standard sample of gasoline was measured 5 times with the following results:  0.13, 0.11, 0.12, 0.20, and 0.14 % by mass. 

(a)  Calculate the arithmetic average and standard deviation of the data
(b) Calculate the 95% confidence interval
(c)  If the accepted value for the standard sample is 0.11 % by mass, are the results for this
set of measurements be significantly different at the 95% confidence level by the t test. 
(d) Can any of the data be rejected by the Q test?