The accompanying observations on stabilized viscosity (cP) for specimens of a certain gr...

The accompanying observations on stabilized viscosity (cP) for specimens of a certain grade of asphalt with 18% rubber added are from the article “Viscosity Characteristics of Rubber-Modified Asphalts” (J. of Materials in Civil Engr., 1996: 153–156):

a. What are the values of the sample mean and sample median?

b. Calculate the sample variance using the computational formula. [Hint: First subtract a convenient number from each observation.]