SOLUTION: (Give your answers correct to TWO (2) decimal places)
In a butter cookies packing plant, the weight (in grams) of a pack of butter cookies packed is normally distributed. A rand
Question 1175519: (Give your answers correct to TWO (2) decimal places)
In a butter cookies packing plant, the weight (in grams) of a pack of butter cookies packed is normally distributed. A random sample of 10 packs was drawn from the plant, and their weights were measured with the following results.
19.5 19.7 20.2 19.7 20.0
19.5 20.2 19.6 20.0 19.9
(a) Calculate the unbiased estimate for the population mean µ and the population standard deviation σ of the weight (in grams) of all butter cookies packed in the plant.
Answer: the unbiased estimate for µ is ____ grams,and the unbiased estimate for σ is ____ grams.
(b) Find the 99% confidence interval for the population mean weight of butter cookies packed in the plant.
Answer: the 99% confidence interval for the population mean weight of butter cookies packed in the plant is from ____ grams to ____grams. Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
Hi
a) mean = 19.83 and s = .267
99% confidence Interval
ME =
ME = 2.576(.267)/√10) = .22
CI = 19.83 ± .22
from 19.61gm to 20.05gm
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