Data

Example one:

51, 62, 98, 55, 55

Mean = \frac{51+62+98+55+55}{5}

= 64.2

Median = 51, 55, 55, 62, 98

= 55

Mode = 55

Without the outlier:

Mean = \frac{51+62+55+55}{4}

= 55.75

Example two:

17, 13, 26, 15, 9, 10

Mean = 15

median = 14

No mode

Range = 26 - 9 = 17

Example three:

The hours a shop assistant spends cleaning the store in with successive weeks are:

8, 9, 12, 10, 10, 8, 5, 10,

mean = 9

b) make the mean equal 10

8 scores add to 72

9 scores add to 90 (9 × 10)

18 in the ninth score

Text book

Q6)

e) 3.5 2.1 4.0 8.3 2.1

mean = 4

median = 3.5

mode = 2.1

range = 6.2

f)

0.7 3 2.9 10.4 6 7.2 1.3 8.5

mean = 5

median = 4.5

mode = none

range = 9.7

g)

6 0 −3 8 2 −3 9 5

mean = 3

median = 3.5

mode = -3

range = 12

Q7

a)

5 7 7 8 12 33

mean = 12

median = 7.5

outlier = 33

b)

2 40 42 45 47

mean = 35.2

median = 40

outlier = 2

Q8)

a)