We wish to see if the dial indicating the oven temperature for a certain model oven is properly calibrated. four ovens of this model are selected at random. the dial on each is set to 300°f, and after one hour, the actual temperature of each is measured. the temperatures measured are 305°, 310°, 300°, and 305°. assume that the distribution of the actual temperatures for this model when the dial is set to 300° is normal. to test if the dial is properly calibrated, we will test the following hypotheses: h0: μ = 300 versus ha: μ ≠ 300. based on the data, what is the value of the one-sample t statistic? a. 4.90 b. 5.0 c. 2.45 d. 1.23