A room temperature is measured with a thermometer which has a known precision of +0.5C when a large number of measurements is taken. How many measurements are necessary to establish the mean temperature t with a 5 percent level of significance such that: T = 1 + 0.15 C For a large number of measurements, the 5 percent level of significance should be obtained by normal distribution table. A room temperature is measured with a thermometer which has a known precision of +0.5C when a large number of measurements is taken. How many measurements are necessary to establish the mean temperature t with a 5 percent level of significance such that: T = 1 + 0.15 C For a large number of measurements, the 5 percent level of significance should be obtained by normal distribution table