Author Question: A private opinion poll is conducted for a politician to determine what proportion of the population ... (Read 72 times)

luminitza · **on:** Jul 25, 2018

A private opinion poll is conducted for a politician to determine what proportion of the population favors adding more national parks.

How large a sample is needed in order to be 90 confident that the sample proportion will not differ from the true proportion by more than 6?
A) 188 B) 376 C) 7 D) 114

Question 2

The amount of soda a dispensing machine pours into a 12 ounce can of soda follows a normal distribution with a mean of 12.54 ounces and a standard deviation of 0.36 ounce.

The cans only hold 12.90 ounces of soda. Every can that has more than 12.90 ounces of soda poured into it causes a spill and the can needs to go through a special cleaning process before it can be sold. What is the probability a randomly selected can will need to go through this process?
A) 0.8413 B) 0.3413 C) 0.6587 D) 0.1587