3389187082

Piotr Zarzycki

6. The blood pressures.p tirrciHg. and the ases. r years. of 7 hospilal patients are sbown m the table below.

Patteat A

p 98    130    120 8S 182    80    135

[£f = 341. Jj> = 833. ]>V = 18181.    = 106397. ]Tę» = 4294S]

(a)    Find S , S_a and S_a for tbese data.

(b)    CaJcnlate che prodoct moment co-rreLaaoa coefncieat for these data

(c)    Inteipiet the coirelation coefficient.

(*)

O)

(d) Oa che eraph paper on page 17. dr a w the scaner diagram of blood pressure agamst age for these 7 patients.

<2)

(e)    Find the eąuetion of ihe regresaan linę ofp on z.

(f)    Plot your regression liae oa your scatter diagram.

(g)    Use your regression linę to esnmate the blood pressure of a 40 yeai old patiem.

Edexcel, Statistics SI, January 2010

3    A company has offices is six towns, A.B.C.D.E and F. The eosts, in f. of travelling between these towns

are sliown in the table.

Use Prim s algońthm. staiting by deletmg row A. to find the cheapest way of eonnecting the six towns. You should show all your working and indicate the order in which the towns were included.    [7]

OCR, Discrete Mathematics 1, 2000

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