A. 93.22 and 5.426
B. 92.3 and 31.99
C. None of the other choices is correct
D. 87.22 and 8.59
E. 92.1 and 18.2
An article in Technometrics (Vol.19, 1977, p.425) presents the following data on the motor fuel octane ratings of several blends of gasoline:
88.5; 98.8; 89.6
Find the sample mean and sample variance of these data.
