A special diet is intended to reduce systolic blood pressure.If the diet is effective, the target is to have the average systolic blood pressure of this group be below 150.After six months on the diet, an SRS of 28 patients with high blood pressure had an average cholesterol ofx_bar = 143, with standard deviation s = 21.Is this sufficient evidence that the diet is effective in meeting the target?Assume the distribution of the cholesterol for patients in this group is approximately Normal with mean .

The P-value for the one-sample t test is

Select one:

a. between 0.01 and 0.05.

b. larger than 0.10.

c. between 0.05 and 0.10

d. below 0.01.