Page 348 - DMTH404_STATISTICS

Statistics

Notes 15. The following table gives the data relating to purchases and sales. Obtain the two regression
equations by the method of least squares and estimate the likely sales when purchases
equal 100.
Purchases : 62 72 98 76 81 56 76 92 88 49
Sales : 112 124 131 117 132 96 120 136 97 85

Answers: Self Assessment

1. (i) same (ii) negative (iii) 0 and 1 (iv) dependence (v) perpendicular, coincident (vi) more
(vii) irreversible.

23.10 Further Readings

Books Sheldon M. Ross, Introduction to Probability Models, Ninth Edition, Elsevier
Inc., 2007.

Jan Pukite, Paul Pukite, Modeling for Reliability Analysis, IEEE Press on
Engineering of Complex Computing Systems, 1998.

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