HKDSE-MATH - 2011SP - Paper 2 -

Ans: (a) $a=11.3$, $b=15.3$ (b) Yes

1. $\begin{array}{rcl}
   1

Ans: (a) Mean $=18$, median $=16$ (b) (i) $18$ (ii) No

1. Mean $=

Ans: (a) $12$ (b) No

1. The new standard deviation

   $\begin{arr

Ans: B
The mean $\overline{x}$

$\begin{array}{cl}
= &

Ans: D
I is true. Note that there are $11$ data. Then the media

Ans: A
I must be true. Note that

$\begin{array}{rcl}
m_1 �

Ans: (a) Mean $=3.5$, inter-quartile range $=2$, standard

Ans: (a) $60\text{ marks}$ (b) Yes

1. Let $\overline{x}$ and $

Ans: B
Since the mode is $14$, there are at least three $14$ in

Ans: A
It is obvious that the crosses move to the right and up.

Ans: D
Note that the median, the lower quartile and the upper