存货估测：基于回归方程的预测值置信范围

"____""____""____"

metadata = {
    "____": "____",
    "____": "____",
    "____": "____",
    "____": "____",
    "____": ["____"],
    "____": ["____", "____", "____"],
    "____": ____
}

"____""____""____"

def solve():
    import pandas as pd
    import numpy as np
    from pyodide.http import open_url
    from io import StringIO

    BASE_URL = "____"
    df = pd.read_csv(StringIO(open_url(____).read()))

    x = df['____'].values
    y = df['____'].values

    coeffs = np.polyfit(____)
    y_hat = np.polyval(____)
    rmse = round(np.sqrt(np.mean((____) ** ____)), ____)

    df['____'] = y_hat.round(____)
    df['____'] = rmse
    df['____'] = (____).round(____)
    df['____'] = (____).round(____)
    df['____'] = df.apply(____)

    result = df[['____', '____', '____', '____', '____', '____', '____']]
    return result.to_string()

if __name__ == "____":
    print(solve())