En un mapa, 1 cm medido en el papel representa a 100 km

a. que distancia en la realidad habrá entre dos puntos que en el papel distan 3,3 cm?

b. que distancia en el papel habrá si en la realidad hay 1 800 km
porfa respondan

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.