The acidity of a chemical solution can be classified as "very high." '•high." 'normal." "low," and "very low." A total of 630 samples of the solution from a production process were obtained, and the acidities were classified as given in DS 10.3.13.
(a) Perform a two-sided hypothesis test of the null hypothesis that the probability that a solution has normal acidity is 0.80.
(b) It is claimed that the probability that a solution has very high acidity is 0.04. the probability that a solution has high acidity is 0.06. The probability that a solution has normal acidity is 0.80. the probability that a solution has low acidity is 0.06 and the probability that a solution has very low acidity is 0.04. Are the data consistent with this claim?