If we use a parametric method to know the answer to this question, we should assume that distribution of glucose levels in blood in this sample are approximately Normal and then, probe:

  Null hypothesis

  Ho:  μ = 100

  Alternative hypothesis

  H1:  μ ≠ 100

Then we calculate a t-statistic test ( no Z) because the little sample size.

                   _

  Mean   X  = 117.27

  s = 49.01

  SE = 15.52

  t = 1.11

  P > 0.05