Vision It is generally believed that nearsightedness affects about 12% of all children. A school district has registered 170 incoming kindergarten children. a) Can you apply the Central Limit Theorem to describe the sampling distribution model for the sample proportion of children who are nearsighted? Check the conditions and discuss any assumptions you need to make. b) Sketch and clearly label the sampling model, based on the 689599.7 Rule. c) How many of the incoming students might the school expect to be nearsighted? Explain.

Elementary Statistics Notes Amanda Selly 8/29/2016 Mean: average To find the mean you add up all the values and then divide by the number of values you have o Population mean: µ= x1+x2+x3+…+xN/N µ= Σx/N o Sample mean: ~x= x1+x2+x3+…+xn/n µ= Σx/n Please note that sample mean is indicated by an x with a bar on top but since I can't make the computer do that we're just using a swivel thing in front of it. Median: the middle number To find the median do the following: o Put all your data in ascending order o Cross off PAIRS of numbers (one is the highest and one the lowest) until there are 1-2 values left (there will