HKDSE-MATH - 2013 - Paper 2 -

Ans: B
A may not be true. The proportion of the profit from the

Ans: C
Let $\overline{x}$ be the mean of the five numbers $x_

Ans: median $=1$, mode $=2$, standard deviation $=0.889$
N

Ans: (a) range $=73\text{ thousand dollars}$, inter-quar

Ans: D
Let $x\text{ cm}$ be the mean height of the $25$ teache

Ans: C
The total expenditure of John that week

$\begin{arra

Ans: B
I may not be true. The greatest possible value of $h$ is

Ans: D
Let $\mu \text{ marks}$ and $\sigma \text{ marks}$ be

Ans: B
Note that adding a constant to all the data of a distrib

Ans: (a) mean $=55\text{ kg}$, median $=52\text{ kg}$, ran

Ans: (a) $60$ marks (b) Yes

1. Let $x$ marks be the score of David

Ans: A
From the box-and-whisker diagram, the upper quartil

Ans: B
For $m=3$, the mean $p$

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= & \

Ans: B
I must be true. Since $x_1 = a_{50}$, then for the first

Ans: (a) $\left\{ \begin{array}{l} a=12 \\ b=8 \end{array

Ans: No
Let $\sigma$ be the standard deviation of the scores

Ans: B
Since the mode of the data is $68$, then there must be th

Ans: B
I is not true. The upper quartile of the distribution i

Ans: C
The new variance

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= & 4^2 \ti