Sebaran frekuensi: Béda antarrépisi

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Dina [[statistik]], a '''frequencysebaran distributionfrekuensi''' isnyaeta adaptar listnilai ofvariabel thenu valuesdicokot that a variable takes in atina [[Sampling (statistics)|samplesampel]]. ItDaptar isieu usuallyilaharna adisusun list, ordereddumasar bykana quantitykuantitas, showingnembongkeun thejumlah numberwaktu ofunggal timesnilai eachnu value appearsngadeukeutan. For exampleConto, iflamun 100 peopleurang ratedibagi akana five-pointlima bagean [[Likert item|attitudesikep itemnilai]] assessingsarta theirmilih agreementdina withskala a1 statementnu onnunjukkeun asatuju scalekacida onsarta which5 1teu denotessatuju strong agreement and 5 strong disagreementkacida, the frequency distributionsebaran offrekuensi theirbisa responsesjadi mightsaperti lookdihandap likeieu:
 
{| border=1 cellspacing=0 cellpadding=2
!Rangking
!Rating
!Tingkat kasatujuan
!Degree of agreement
!Jumlah
!Number
|-
|1
|Satuju kacida
|Strongly agree
|25
|-
|2
|Satuju
|Agree somewhat
|35
|-
|3
|Teu yakin
|Not sure
|20
|-
|4
|Teu satuju
|Disagree somewhat
|15
|-
|5
|Teu satuju kacida
|Strongly disagree
|5
|}
 
[[Tes hipotesa statistik]] dipanggihkeunnu kapanggih dina taksiran nilai nu beda sarta sarua antara distribusi frekuensi. Taksiran ieu kaasup ukuran [[Measures of central tendency|centralkacenderungan tendencyka tengah]] atawa [[Average|averagesrata-rata]], saperti [[mean]] jeung [[median]], sarta ukuran variabiliti atawa [[dispersi statistik]], saperti [[simpangan baku]] atawa [[varian]].
 
ASebaran frequencyfrekuensi distribution is said to bedisebut [[Skewness|skewedmencong]] whenlamun itsnilai mean andjeung median areboga differentnilai nu beda. The [[kurtosisKurtosis]] oftina asebaran frequencyfrekuensi distributionnyaeta isngumpulna theskor concentration of scores at thedina mean, oratawa hownembongkeun peakedposisi thepuncak distributionsebaran appearssacara if depicted graphicallygrafis—forcontona example, in adina [[histogram]]. IfLamun thesebaran distributionpuncak issebaran moreleuwih peaked than theti [[sebaran normal distribution]] it is said to bedisebut leptokurtic; if less peaked it is saidlamun tokurang bedisebutna platykurtic.