SOLUTION: A researcher revealed that the average number of people who have a driver's license out of a sample of 100 people is 1.5 with a standard deviation of .3. Find the 80% confidence
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Question 1140345: A researcher revealed that the average number of people who have a driver's license out of a sample of 100 people is 1.5 with a standard deviation of .3. Find the 80% confidence interval for the mean of the population. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! z for 80% half-interval CI is +/-1.28
half-interval is 1.28*0.3/sqrt(100)=0.0384
interval is (1.46, 1.54) rounded
