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En un estudio realizado sobre una muestra representativa de una comunidad se ha observado una prevalencia de hipertensin arterial (HTA) del 15%. Si se toma

En un estudio realizado sobre una muestra representativa de una comunidad se ha observado una prevalencia de hipertensin arterial (HTA) del 15%. Si se toma una muestra de 30 personas al azar

a) Cual es la probabilidad de que tengan una prevalencia menor o igual del 17%.

b) Cuantas muestras necesitramos para el estudio si tomamos un error estndar proporcional de 3.5%

In a study carried out on a representative sample of a community, a prevalence of arterial hypertension (HTN) of 15% was observed. If a sample of 30 people is taken at random

a) What is the probability that they have a prevalence less than or equal to 17%.

b) How many samples would we need for the study if we take a proportional standard error of 3.5%

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