Question: How do I solve this statistics problem? 4. Un manufacturero indica la duraci6n, en horas, de un foco de 75 watts es de porlo menos

4. Un manufacturero indica la duraci6n, en horas, de un foco de

How do I solve this statistics problem?

4. Un manufacturero indica la duraci6n, en horas, de un foco de 75 watts es de porlo menos 1000 horas, con una desviacin estndar de 25 horas. Se toma una muestra aleatoria de 25 focos, 10 cual resulta tener una duracin promedio de = 980 horas. Utilice un alfa de 0.01.

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