Question Answered step-by-step A filling machine puts an average of four ounces of coffee in jars,… A filling machine puts an average of four ounces of coffee in jars, with a standard deviation of 0.25 ounces. Forty jars filled by this machine are selected at random. a.) What is the probability that the mean amount per jar filled in the sampled jars is less than 3.9 ounces? b.) Find the z score. Math Statistics and Probability Share QuestionEmailCopy link Comments (0)