A population with a mean of µ = 6 has Σ X = 42. How many scores are in the population?Group of answer choicesN=42N = 42/6 = 7N = 6*42 = 252N = 6/42 = 1/7
Question
A population with a mean of µ = 6 has Σ X = 42. How many scores are in the population?Group of answer choicesN=42N = 42/6 = 7N = 6*42 = 252N = 6/42 = 1/7
Solution
Para resolver esta pregunta, necesitamos usar la fórmula de la media (µ) de una población, que es:
Donde:
- es la media de la población.
- es la suma de todos los valores en la población.
- es el número de puntuaciones en la población.
Nos han dado los siguientes valores:
Queremos encontrar . Reorganizamos la fórmula para resolver :
Sustituimos los valores dados:
Por lo tanto, la respuesta correcta es:
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