1. A random sample of 49 business establishments shows that the average monthly water consumption is 35 cubic meters with a standard deviation of 5 cubic meter. Test the hypothesis that the average monthly water consumption is 34 cubic meters at 1% level significance.
2. The average weight of 9 grade 6 pupils is 36kg with a standard deviation of 0.4kg. Is there a reason to believe that the pupil's average weight is less than 36.3kg at 5% level of significance?