private void button_StartTesting_Click(object sender, EventArgs e)
{
result = Stat.HypothesisTesting(MainForm.MainDT, comboBox_Cols.Text,
comboBox_Statistics.Text, comboBox_Operation.Text, comboBox_Tail.Text,
Convert.ToDouble(comboBox_Significance.Text), Convert.ToDouble(textBox_NullHypothesis.Text));
MainForm.S.richTextBox1.AppendText(result);
MainForm.S.richTextBox1.Select(); //让RichTextBox获得焦点
MainForm.S.richTextBox1.Select(MainForm.S.richTextBox1.TextLength, 0); //将插入符号置于文本结束处
MainForm.S.richTextBox1.ScrollToCaret();
}