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STATISTICS

PAPER 1

1. A set of positive integers consists of 2 , 5 and m. The variance of this set of

integers is 14. ind the va!"e of m.

2. A set of seven n"m#ers has a mean of $.a. ind % &.

#. 'hen a n"m#er ( is added to this set, the ne) mean is *.5. +nd theva!"e of (.

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. A gro"p of - st"dents has a tota! mass

of 24 (g. the s"m of the s/"ares of

their masses is $-54 (g. inda. The mean mass of the -

st"dents.

#. The standard deviation.

PAPER 2.

4. Ca!c"!ate the median.

0ar(s re/"enc11 2

112 321 *14 1415 1

5.

0ar(s o of st"dents11 5

112 *21 214 1415 3

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a. ind the mode mar( from histogram6#. Ca!c"!ate the standard deviation of the mar(sc. Ca!c"!ate mean, variance and median.