Question

A consumer organization was interested in determining whether any difference existed in the average life of four different brands of transistor radios batteries. A random sample of four batteries of each brand was ftested with the following results (in hours) Brand B Brand A Brand C Brand D 12 21 14 14 15 17 19 21 18 12 20 25 10 19 23 20 Pengiraan awal adalah seperti berikut Preliminary computations are as folbows: ΣΣΧ-5176 ΣΣΧ,- 20 ΣΧ,-55 Σx,- ΣΧ-8 ΣX,-0 Adakah bukti perbezaan dalam purata hayat empat jenama bateri radio transistor tersebut? Is there evidence of a difference in the average life of these four brands of transistor radios batteries? n markahimarkel

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Answer 1

Ans Hypothesia Ho One T diHerent Atleast We teat f one yANOVA Brond A fep. 4 14 2 1 2. 19 20 2 5 3. 1 2 20 2 o 4 2 3 5 5 62 83 3 o2 S 6889 3044 6400 gi.2 n4 k 4 Sst62+ F 3 + 80 = 2 9o 24i.2 302 S t 38 44 + 6889+64 oo = 20158 2/22s202 517 2 SS Total Kh +04o0 576 4 x4 49oo 9 EIS 276 SS To tal 2 2. - nK n 78 4 oo 20S8 4X 4 4

5039. 5- 4 9 oro STreat mn 139.5 SS Total SS Tseatment SSEor 276-136.S SSEo 139.5 MS= SS 5 4x 4- 1 nk-= df Total dt Exror nkk I6- 4= 2 dtTrea tmen t = k-=4- - 3 ANOV A Table SS S U df MS AS.S/1625 13.5/3 45. s Treatment 136.5 3.913 139.5/12 -625 2 39.S EYTOT Total 2 76 MS (Treot ment) MS(Emr) Crittcal F-valui FI 0.3,12)= 3.49 Fcal 3.9 13 Heneu Fcal 3.9 13 7 Ftb3. 49 Hence rei fet the null iypothesa ife for fo ur bronds ot ivansihtor duerage roclio batHeries Hena, the gre not 6ome