Posted by Jamie on Wednesday, April 21, 2010 at 10:00pm.
A random survey of 500 households
determines that 20% of the households would do so and that each participating
household expects to recycle about 100 cans monthly with a standard deviation
of 30 cans.
Question
(a) What is the 95%
confidence interval regarding the percentage of households expected to
recycle?
(b) what is the 95% confidence interval regarding the number of cans to be recycled?

Math  Jamie, Wednesday, April 21, 2010 at 10:25pm
is 7.02 correct for A
and I am still stuck on B