From From past experience, a company has found that in carton of transistors, 80% contain no defective transistors, 5% contain one defective transistor, 8% contain two defective transistors, and 7% contain three defective transistors. If the mean defectiveness is 0.42, find the variance and standard deviation past experience, a company has found that in carton of transistors: 92% contain no defective transistors 3% contain one defective transistor, 3% contain two defective transistors, and 2% contain three defective transistors. Calculate the mean and variance for the defective transistors. Mean = Variance = (Please round answers to 4 decimal places.)