a random sample of 10 houses in big rapids, each of which is heated with natural gas, is selected and the amount of gas (therms) used during the month of january is determined for each house. the population distribution looks normally distributed when plotted on a probability plot. the resulting observations are: 104 113 129 127 152 115 124 161 120 123 given the 10 observations, match the value of the following sample statistics: