Предмет: Математика, автор: selivaev1979

Дано вибірку: 5, 5, 6, 8, 4, 11, 6, 4, * 3 бали 4, 9, 12, 6, 4, 5, 9, 4, 12, 9, 9, 8
Знайти моду, медіану та середнє значення вибірки​

Ответы

Автор ответа: motoroller2se
1

Ответ:

Мода - 5

Медиана = 6

Среднее значение = 7

Пошаговое объяснение:

Я так понял что фраза про три балла там типа рекламы. поэтому выборка такая:

5, 5, 6, 8, 4, 11, 6, 4, 4, 9, 12, 6, 4, 5, 9, 4, 12, 9, 9, 8

Сначала нужно построить упорядоченную выборку.

4, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 8, 8, 9, 9, 9, 9, 11, 12, 12

Мода - это самое часто встречающееся число. Это 5.

Медиана - это среднее значение чисел стоящих по центру.

4, 4, 4, 4, 4, 5, 5, 5, 6, 6, 6, 8, 8, 9, 9, 9, 9, 11, 12, 12

В центре стоят шестерки. Их среднее = 6.

Среднее значение равно отношению суммы чисел  к количеству чисел:

(4+4+4+4+4+5+5+5+6+6+6+8+8+9+9+9+9+11+12+12)/20=140/20=7

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