According to a recent survey, the average urban person consumes 1.5 kg of food per day. Is this figure also true for rural people? Suppose 64 rural people are identified by a random procedure and their average consumption per day is 1.57 kg of food. Assume a population variance of 0.52 kg² of food per day. Use a 5% level of significance to determine whether the survey figure for urban people is also true for rural people on the basis of the sample data.