Data were obtained from a randomly selected sample of 25 UMass students. The study observed a mean serum folate concentration of 37.2 nmol/L (standard deviation of 9 nmol/L). Assume the mean serum folate concentrations of US adults aged 20-39 is 36.0 nmol/L. What statistical test is most appropriate to assess if the UMass students mean folate concentration differs from that of the US adults aged 20-39 overall?

Select one:

a.

ANOVA

b.

1-sample z-test

c.

F test

d.

1-sample t-test