Question

8. 900 oranges in a bin have weights that are normally distributed around a mean of 4.84 oz, with a standard deviation of 0.25 oz. They are to be made up into packages of 12, essentially drawn at random. About what proportion of the packages will weigh less than 60 oz?

a) 98.7%

b) 73.9%

c) 50%

d) 95.1%

9. A very large stock of yogurt has 18% of its cartons stored past the due date. If a random sample of 60 cartons is drawn, the possible sample proportions P form a "sampling distribution" that is centered at 0.18, with a standard error of

a) 0.38

b) 0.17

c) 0.05

d) 0.02

Answer 1