A self-serving soda-dispensing machine at a fast-food restaurant is supposed to deliver 32 oz with the lowest possible standard deviation when a medium drink is ordered. A simple random sample of 20 servings shows the following data: The mean of the data set is 32.1 oz; the sample standard deviation is 0-9 oz- At 1% significance level, test the claim that the standard deviation of soda servings is greater than 0.? oz, assuming that the population is normal. Procedure: Assumptions: {select everything that applies] I] The number of positive and negative responses are both greater than 10 I] Normal population I] Population standard deviation is known l:l Sample size is greater than 3D I:I Simple random sample I] Population standard deviation is unknown