[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify code snippets into one of the following categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']."}, {'role': 'user', 'content': 'Identify the single most appropriate category to which the provided code belongs. Provide your response as a single category label without any additional information, commentary, or personal opinions.\\nPython Code:import numpy as np\nimport collections\nimport scipy as sp\nimport pandas as pd\nfrom scipy.stats import norm\nfrom numpy.random import normal\nimport matplotlib.pyplot as plt\nimport seaborn as sns\nfrom scipy import stats\nimport statsmodels.formula.api as smf\nimport statsmodels.api as st\n%matplotlib inline'}, {'role': 'assistant', 'content': 'helper_functions'}]