SOLUTION: A random sample of 36 widgets from a recent batch had an average weight of 5 pounds. The standard deviation of the population of widgets is known to be 0.6 pounds. What is the lo
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Question 1141973: A random sample of 36 widgets from a recent batch had an average weight of 5 pounds. The standard deviation of the population of widgets is known to be 0.6 pounds. What is the lower limit of a 90% confidence interval based on this data? Use three decimal places in your answer Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! z value since sd is known
half-interval is z(0.95)*sigma/sqrt(n)=1.645*0.6/6=0.1645
CI is mean +/-half-interval and mean is the point estimate or 5 pounds
(4.835, 5.165) units pounds
answer is 4.835 pounds
