# Question

The investment website of Exercise 1 draws a random sample of 200 investors from their customers. Suppose that the true proportion of smart phone users is 36%.
a) What would the standard deviation of the sampling distribution of the proportion of smart phone users be?
b) What is the probability that the sample proportion of smart phone users is greater than 0.36?
c) What is the probability that the sample proportion is between 0.30 and 0.40?
d) What is the probability that the sample proportion is less than 0.28?
e) What is the probability that the sample proportion is greater than 0.42?

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