Repeat analyses of the sulphate in ground waters using agravimetric analysis technique yielded the following data forsuccessive samples: 27.4, 27.6, 25.2, 27.3, 27.3 ppm sulphate.Using 95% confidence criteria which of the following statements istrue?
Select one:
a. 25.2 should be rejected
b. 27.4 should be rejected
c. 25.2 and 27.4 should be rejected
d. no data should be rejected
