Ellison Mechanical manufactures automatic shutoff valves that can prevent extensive water damage from plumbing failures. The valves contain sensors that cut off water flow in the event of a leak, thereby preventing flooding. One important characteristic is the time (in milliseconds) required for the sensor to detect the water flow. The data obtained for four different shutoff valves are contained in the file titled Waterflow. Based on these data, test to determine if the sensor response times are normally distributed. Use a chi-square goodness-offit test and a significance level of 0.05. Use five groups of equal width to conduct the test.