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中级

Jackknife估计

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中级参考 代码结构已给出，请填写 ____ 处 
def solve():
    from sklearn.datasets import load_iris
    import numpy as np
    iris = load_iris()
    data = iris.data[:, ____]
    n = len(____)
    jackknife_means = []
    for i in range(____):
        sample = np.delete(____)
        jackknife_means.append(np.mean(____))
    jackknife_means = np.array(____)
    full_mean = np.mean(____)
    jackknife_bias = (____) * (np.mean(____) - full_mean)
    jackknife_se = np.sqrt((____) / n * np.sum((jackknife_means - np.mean(____)) ** ____))
    print(____)
    print(____)
    print(____)
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