Programming, Artificial Intelligence, Machine Learning, Data Science, Python.
first calculate the mean and standard deviation for each friend: Mean: Alice: (85 + 92 + 78) / 3 = 85 Bob: (60 + 70 + 65) / 3 = 65 Charlie: (95 + 88 + 92) / 3 = 91.67 Standard Deviation: Alice: sqrt(((85–85)² + (92–85)² + (78–85)²) / 3) = 7.02 Bob: sqrt(((60–65)² + (70–65)² + (65–65)²) / 3) = 5.00