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13 March, 15:13

The table shows the number of families staying at a campsite in 2015.

Questionnaires are sent to 60 families.

The sample of size 60 is stratified by type of unit and area.

Area

a) How many families who

Woods Fields Clifftop

stayed in a Tent in the

Woods are sent a

Caravan 25

20

35 questionnaire?

Type of unit Tent

15

30

b) How many families who

45

stayed in a Caravan

Motorhome 60

are sent a questionnaire?

50

20

Total

100

100

100

+3
Answers (1)
  1. 13 March, 15:24
    0
    a) = 3 b) = 16

    Step-by-step explanation:

    60/300 = 1/5

    a) 1/5 x 15=3

    b) 25 + 20 + 35=80

    1/5 x 80 = 16

    (correct on mathswatch)
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