ʶԵѴǹҧСüѹͧ

ҡҧͧ

ҡҧ ҷ繵᷹ͧŪش˹ ͡Ƕ֧ҡҧͧŪش ҤҴѧҨͧҾͧŪش ҡҧ· (mean) Ѹ°ҹ (median) ҹ (mode) ¤ҡҼͧŷء ô¨ӹǹŷ Ѹ°ҹҡ§ӴѺ ͡ҷçҧ繤Ѹ°ҹ 觨ըӹǹ 50% դҹ¡ҡҤѸ°ҹ ҹ͡ŷդҫӡѹҡش繰ҹ شٻ 1, 2, 3 ҧҧ դҡҧԴҧ ѧ (K = 1 ¡)

ٻ 1 mean = 3, median = 3, mode = 3

ٻ 2 mean = 3, median = 3, mode

ٻ 3 mean = 3, median = 3, mode ͧҤ 1 5

üѹͧ

üѹ ҷʴᵡҧҧ㹡 ʴáШ¢ͧŪش˹ҡ͹§ üѹѹҡش §ູҵðҹ (standard deviation: sd) ҢաáШҡ sd դҡ ҢաáШ¹ sd դҹ Ңŷءդҡѹ sd դҡѺٹ · sd ѡǺѺ sd ͤҷ§ູͺ ͧͧõѴô sd ǺѺѸ°ҹ Ѹ°ҹ繤ҡҧշش͢ᨡᨧ繻 ٻ 1, 2, 3 ҧդҡѹ 3 դ§ູҵðҹᵡҧѹѧ

ٻ 1 5 ¡ä 3, 3, 3, 3, 3 ¤ 3 (sd = 0.0)

ŷء¡դҡѹ ֧դ§ູҵðҹҡѺٹ


ٻ 2 5 ¡ä 1, 2, 3, 4, 5 ¤ 3 (sd = 1.6)

§ູͺ ҡѺ 1.6


ٻ 3 5 ¡ä 1, 1, 3, 5, 5 ¤ 3 (sd = 2.0)

§ູͺ ҡѺ 2 .0


ѧࡵҡٻ 1, 2, 3

    1. 㹡÷ӤҾͧŪش㴪ش˹觹 ҾԨó੾Ф зͧҾѴਹѡ ҾԨóҤ sd Сͺ зͧҾѴਹҡ觢

    2. 㹡þԨóҡüѹͧ ͡ҡоԨóҨҡ sd ҨԨóҨҡ Էüѹ (coefficient of variation: c.v.) Էüѹ з§ູͺ c.v. = (sd / mean) x 100 Ҿͧٻ 1, 2, 3 ҹ ӹdz c.v. 0.0%, 53.3% 66.7% ӴѺ ʴҾͧٻ 1 աüѹ Ҿͧٻ 3 աüѹҡش ŷաᨡᨧԨԷüѹҡѺ 20% (ŷԷüѹ 20% 繵ͧաᨡᨧ)

Ť§ູҵðҹ (sd)

صռԹͧͧ˹觨ӹǹ 5 Ţ 1 ֧ 5 ᷹дѺͧûԹ
1 = ·ش, 2 = , 3 = ҹҧ, 4 = ҡ, 5 = ҡش

ٻ 1 ԹءԹдѺ ҹҧ ҼԹդʹͧѹء (sd = 0.0)


ٻ 2 Թ дѺ ҹҧ ǡѺٻ 1 »ԹдѺ·ش, , ҹҧ, ҡ ҡشдѺ˹觤 ҼԹդ§ູͺ ҡѺ 1.6 дѺ


ٻ 3 Թ дѺ ҹҧ ǡѺͧá ԹдѺ ·ش 2 (ôѧࡵ˹ҢͧԹش 2 ͧ ٻ 3) дѺҹҧ 1 дѺ ҡش 2 (ôѧࡵ˹ҢͧԹش 2 ͧ ٻ 3) 觼Թդش价ͧҹ ͧ Ѵ§ູͺ ǨդҡѺ 2.0 дѺ ʴҼԹդᵡҧѹҡ ͹ 㹡ûԹŪԴ 5 дѺẺҧ鹹 sd դԹ 1 ǶҼԹդᵡҧѹҡ


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