The local
bakery bakes more than a thousand 1-pound loaves of bread daily,
and the weights of these loaves varies. The mean weight is 1.2 lb.
and 2 oz., or 601 grams. Assume the standard deviation of the
weights is 25 grams and a sample of 46 loaves is to be randomly
selected.
(a) This
sample of 46 has a mean value of
x, which
belongs to a sampling distribution. Find the shape of this sampling
distribution.
skewed
rightapproximately
normal skewed
leftchi-square
(b) Find the mean of this sampling distribution. (Give your answer
correct to nearest whole number.)
grams
(c) Find the standard error of this sampling distribution. (Give
your answer correct to two decimal places.)
(d) What is the probability that this sample mean will be between
599and 603? (Give your answer correct to four decimal
places.)
(e) What is the probability that the sample mean will have a value
less than 595? (Give your answer correct to four decimal
places.)
(f) What is the probability that the sample mean will be within 2
grams of the mean? (Give your answer correct to four decimal
places.)