The manager of a grocery store has taken a random sample of 36 customers. The average grocery bill on a visit was $46.85 with the sample standard deviation of $22.80. The manager wants to determine whether or not the mean grocery bill for all his customers is significantly more than $55. Assuming normal distribution of grocery bills, the p-value for this test is

Select one:

a 0.9684

b 0.9842

c 0.0158

d 0.03156