Q1a. If the true proportion of voters who support a metro line in Dublin is p = .60, what is the probability that a sample of size 200 yields a sample proportion i) between .70 and .75 and ii) greater than p= 0.50.

Find the quotient. 50a2 – 98b2 -5a +7b

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables