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Use the ResidentialWater data file in the chapter 9 folder. This file contains the average price of residential water, Rate (5CCF), for cities across the united states. The city of Tulsa charges $21.62. Find the sample mean from the data and conduct a two tailed hypothesis test to determine if the price in Tulsa differs significantly from the sample mean in the data. Use the Tulsa price as the hypothesized value. What is the p-value of your test? .258 .129 .049 .871 The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes. The population standard deviation is known to be 0.5 minute. We want to test to determine whether or not the mean waiting time of all customers is significantiy more than 3 minutes. Refer to Exhibit 92. The p-value is 025 .456 , 05 , 0228