E lIZIpe-n with Google Docs v A soft drink dispensing machine must be adjusted if the variance of the contents of exceeds 1.50 m|1{m|3 = squared milliliter]. A random sample of 20 drinks from this machine has a variance of 1.90 11113. Is it sufficient sample evidence that the machine must be adjusted? Test an appropriate hvpothesis at 0:005. Assume that the contents dispensed bv the machine are approximatelv normallv distributed. a. State null and research hypotheses about population variance :72. H0: H]: b. Find the observed value of test statistic. Keep 3 digits after decimal point in the expression for observed value of test statistics. 2 The observed value of test statistic is labs = e. State the rejection region. The rejection region is X3 c. Insert the word sufficient or insufficient into the following statement. There is sample evidence to conclude that the machine must be adjusted