Solid fats are more likely to raise blood cholesterol levels than liquid fats. Suppose a nutritionist analyzed the percentage of saturated fat for a sample of 6 brands of stick margarine (solid fat) and for a sample of 6 brands of liquid margarine and obtained the following results:

stick=[26.5,26.1,25.6,26.7,25.9,25.9]

liquid=[16.6,16.5,17.4,17.4,17.2,16.8]

We want to determine if there a significant difference in the average amount of saturated fat in solid and liquid fats. What is the test statistic? (assume the population data is normally distributed)

a)t = 24.797

b)t = 38.866

c)z = 38.866

d)z = 38.366

e)t = 38.366