Apps. and Interpretation for IBDP Maths Ebook 2 | Page 259
www . seprodstore . com 249 16 Chapter
1
6 Point Estimation � Central limit theorem : 1 . 2 ~ ( , ) i X N �� 2 . 1 2 n X X X X n � � � � : Sample mean 3 . 2 ~ , X N n � � � � � � � � when n is sufficiently large � Properties of point estimation : 1 . 2 2 1 1 ( ) 1 n i i n X X s n � � � � � � : Sample variance 2 . 2 2 1 1 n n n s s n �
�
� , where 2 2 1 ( ) n i i n X X s n � � � � 3 . E ( ) X X � 4 . 2 2 1 E ( ) n s � � � Solutions of Chapter 16 SUMMARY POINTs
www . seprodstore . com 249 16 Chapter
1
6 Point Estimation � Central limit theorem : 1 . 2 ~ ( , ) i X N �� 2 . 1 2 n X X X X n � � � � : Sample mean 3 . 2 ~ , X N n � � � � � � � � when n is sufficiently large � Properties of point estimation : 1 . 2 2 1 1 ( ) 1 n i i n X X s n � � � � � � : Sample variance 2 . 2 2 1 1 n n n s s n �
�
� , where 2 2 1 ( ) n i i n X X s n � � � � 3 . E ( ) X X � 4 . 2 2 1 E ( ) n s � � � Solutions of Chapter 16 SUMMARY POINTs
Apps. and Interpretation for IBDP Maths Ebook 2 | Page 258
Apps. and Interpretation for IBDP Maths Ebook 2 | Page 260