David y Carmen están mirando hacia la punta de una torre de enfriamiento de energía nuclear: se encuentran parados a una distancia de 150 m uno de otro en el mismo nivel horizontal. Carmen ve la punta de la torre con un ángulo de elevación de 38° y David la ve con un ángulo de elevación de 60° ¿Cuál es la altura de la torre?

Unaware that 35% of the 10000 voters in his constituency support him, a politician decides to estimate his political strength. a sample of 200 voters shows that 40% support him. a. what is the population? b. what is the parameter of interest? state its value c. what is the statistics of the interest? state its value d. compare your answers in (b) and (c) is it surprising they are different? if the politician were to sample another 200 voters, which of the two numbers would most likely change? explain