20.5895 9 3 Lily Energy system manufactures wood-burning headers and fire place inserts/ One of its systems has an electric blower, which is thermostatically controlled . The blower is designed to automatically turn on when the temperature in the stove reach 125 F and turn off at 85 F. complaints from customers 1 indicate that the thermostat control isn't working properly The company take a sample of 2ill! thermostats and finds that the variance equals 289 The calculated , Chir square test . Statistic and table value, for a 0.05, significance level are