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awapan Ujian (Nov 2014)
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Jawapan Ujian:
1
(a) draw a histogram
(b) mean=51.7
(c) median=51.95
(d) IQR = 34.04
(e) variance=485.502
2
(a) draw a scatter diagram
(b) Rs = -0.1
Spearman rank correlation is used because: (i)Data not normally distributed , (ii)Data is rank
3
(a) 17.1388 and 22.8612
(b) percentage rejected is 18.14%
(c) (i) X Z/2 /n = 16.2 0.575
(ii) 636 workers
4
(a) Y = -1.7 + 0.84X
(b) y = 3.172
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