Ketevan Manjgaladze

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სტატისტიკურად მნიშვნელოვანი განსხვავება

Statistically Significant Difference

სტატისტიკურად მნიშვნელოვანი განსხვავება ნიშნავს, რომ სტატისტიკური ანალიზის საფუძველზე დადგენილია არსებითი განსხვავება შერჩევის მონაცემებსა და ნულოვან ჰიპოთეზაში გამოთქმულ ვარაუდს შორის.

უმცირეს კვადრატთა მეთოდი

Least Square Method / Ordinary Least Squares / OLS

მათემატიკური მეთოდი, რომელიც დაფუძნებულია საძიებელი ცვლადების შემცველი გარკვეული ფუნქციების კვადრატების მინიმიზაციაზე.

უწყვეტი მონაცემები

Continuous Data

ამ მონაცემებმა შეიძლება მიიღოს ნებისმიერი რიცხვითი მნიშვნელობა ცვლადის რაიმე ორ დონეს შორის ანუ რაიმე რიცხვითი შუალედიდან.

ფაქტორული ანალიზი

Factorial Analysis

ეს მეთოდი პირველად გაჩნდა ფსიქომეტრიაში და ამჟამად ფართოდ გამოიყენება არა მხოლოდ ფსიქოლოგიაში, არ

ფიშერის განაწილება

Fisher’s Distribution

ალბათურ განაწილებათა ოჯახი მარჯვნივ ასიმეტრიული ფორმით. ეს ფორმა დამოკიდებულია ორ ნატურალურ რიცხვზე (ორ თავისუფლების ხარისხზე). 

ფრიდმანის Anova

Analysis of variance / Friedman‘s Anova

კრასკელ - უოლისის ტესტი გვაძლევს საშუალებას შევადაროთ რამოდენიმე ერთმანეთისგან  დამოუკიდებელი შერჩევა (სხვადასხვა ცდის პირებისგან შედგენილი ჯგუფები სხვადასხვა პირობაში) ერთგვაროვნების თვალსაზრისით, რაც გულისხმობს, რომ შერჩევები აღებულია ერთი პოპულაციიდან.

შერეული ANOVA

Mixed ANOVA

გამოიყენება რამოდენიმე საშუალოს შესადარებლად, როცა სქემაში ჩართულია რამოდენიმე დამოუკიდებელი ფაქტ

შერჩევა

Sample

სამიზნე ჯგუფს, რომელზეც უნდა ჩატარდეს კვლევა, ეწოდებათ კვლევის სუბიექტები.

შერჩევითი განაწილება

Sampling Distribution

პოპულაციიდან აღებული n მოცულობის მქონე ყველა შესაძლო შერჩევიდან მიღებული სტატისტიკის მნიშვნელობების ალბათური თეორიული განაწილება.

შესწორებული დეტერმინაციის კოეფიციენტი

Adjusted Coefficient of Determination

გამოიყენება იმისათვის, რომ ერთმანეთს შევადაროთ რეგრესიული მოდელები, რომლებშიც განსხვავებული რაოდენობის ამხსნელი ცვლადებია (

ჩანაცვლება

Bias

სისტემატური შეცდომა ანუ ჩანაცვლება არის განსხვავება ცვლადის ნამდვილ მნიშვნელობასა და ექსპერიმენტი

ჩაუნაცვლებელი შეფასება

Unbiased Estimate

შეფასება ჩაუნაცვლებელია, თუ მისი მნიშვნელობების საშუალო არითმეტიკული, გამოთვლილი უსასრულოდ ბევრი შერჩევიდან შესაფასებელი პარამეტრის მნიშვნელობის ტოლია.

ჩებიშევის უტოლობა

Chebishev’s Inequality

მონაცემთა სიმრავლის სტანდარტული გადახრის საშუალებით შესაძლებელია სხვადასხვა ინტერვალში მოხვედრილ

ცენტრალური მომენტი

Central Moment

ამბობენ, რომ X შემთხვევით სიდიდეს აქვს k რიგის ცენტრალური მომენტი და ამას  აღნიშნავენ αk=E(X-μ)k, თუ EX-μk<∞, სადაც E - მათემატიკური ლოდინია, k ნატურალური რიცხვია, μ=EX.                            

ცვლადი

Variable

თითოეულ მახასიათებელს, რომელიც იცვლება შერჩევაში ან პოპულაციაში ცვლადი ეწოდება.

ძალმოსილება

Consistency

ახასიათებს პოპულაციის პარამეტრის წერტილოვანი შეფასების ქცევას, როდესაც შერჩევის მოცულობა ძალიან ი

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