Pembahasan Ujian PAI: A70 – No. 20 – November 2016

Selang kepercayaan 95%

• \(\begin{array}{*{20}{c}}{\hat H\left( t \right) = \sum\limits_{i = 1}^{j – 1} {\frac{{{s_i}}}{{{r_i}}}} }&{{y_{j – 1}} \le t < {y_j}}\end{array}\)
• \(\begin{array}{*{20}{c}}{\widehat {Var}\left( {\hat H\left( t \right)} \right) = \sum\limits_{i = 1}^{j – 1} {\frac{{{s_i}}}{{r_i^2}}} }&{{y_{j – 1}} \le t < {y_j}}\end{array}\)
• Batas interval kepercayaan: \(\hat H\left( t \right) \pm {z_p} \cdot \sqrt {\widehat {Var}\left( {\hat H\left( t \right)} \right)} \)