Question

If the manager of a bottled water distributor wants to estimate, with 95% confidence, the mean amount of water in a 1-gallon bottle to within ±0.002 gallons and also assumes that the standard deviation is 0.05 gallons, what sample size is needed?

Answer #1

A bottled water distributor wants to estimate the amount of
water contained in 1-gallon bottles purchased from a nationally
known water bottling company. The water bottling company's
specifications state that the standard deviation of the amount of
water is equal to 0.02 gallon. A random sample of 50 bottles is
selected, and the sample mean amount of water per 1-gallon bottle
is 0.993 gallon.
A. Construct a 95% confidence interval
estimate for the population mean amount of water included in...

A bottled water distributor wants to determine whether the mean
amount of water contained in 1-gallon bottles purchased from a
nationally known water bottling company is actually 1 gallon. You
know from the water bottling company specifications that the
standard deviation of the amount of water per bottle is 0.03
gallon. You select a random sample of 100 bottles, the mean amount
of water per 1-gallon bottle is 0.994 gallon.
a. Is there evidence that the mean amount is different...

A bottled water distributor wants to estimate the amount of
water contained in 1-gallon bottles purchased from a nationally
known water bottling company. The water bottling company's
specifications state that the standard deviation of the amount of
water is equal to 0.02 gallon. A random sample of 50 bottles is
selected, and the sample mean amount of water per 1-gallon bottle
is 0.979 gallon.
a. Construct a 95% confidence interval estimate for the
population mean amount of water included in...

A bottled water distributor wants to estimate the amount of
water contained in 11-gallon bottles purchased from a nationally
known water bottling company. The water bottling company's
specifications state that the standard deviation of the amount of
water is equal to 0.040.04 gallon. A random sample of 5050 bottles
is selected, and the sample mean amount of water per 11-gallon
bottle is 0.992 gallon. COMPLETE PARTS (a) THROUGH
(d).
a. Construct a 99% confidence interval
estimate for the population mean...

A bottled water distributor wants to determine whether the mean
amount of water contained in 1-gallon bottles purchased from a
nationally known water bottling company is actually 1 gallon. You
know from the water bottling company specifications that the
standard deviation of the amount of water is
.03 gallon. You select a random sample of 50 bottles, and the
mean amount of water per 1-gallon bottle is 0.993 gallon. Complete
parts (a) through (d) below.
a. Is there evidence that...

If the inspection division of a county weights and measures
department wants to estimate the mean amount of? soft-drink fill
in? 2-liter bottles to within plus or minus0.02 liter with 95?%
confidence and also assumes that the standard deviation is 0.09
?liters, what sample size is? needed?

The manager of a gasoline supply corporation wants to estimate
the actual amount of gasoline contained in standard 42-gallon
barrels purchased from a nationally known manufacturer. The
manufacturer’s specifications state that the amount of gasoline is
normally distributed with a standard deviation of 0.65 gallon. A
random sample of 25 barrels is selected, and the sample mean amount
of gasoline per 42-gallon barrel is 42.15 gallons. Construct a 90%
confidence interval estimate for the population mean amount of
gasoline contained...

A manager wishes to estimate a population mean using a 95%
confidence interval estimate that has a margin of error of
±44.0 If the population standard deviation is thought to be
610, what is the required sample size?

1. Bottled water distributors want to determine whether the
contents of the 1 gallon bottle are actually 1 gallon. It is known
from the specifications of water bottling companies that the
standard deviation of water content per bottle is 0.02 gallons. If
a random sample of 50 bottles is chosen, and the average sample of
water content per 1 gallon bottle is 0.995 gallons.
a. Is there any evidence that the average water content in bottles
is not the same...

Bottled water distributors want to determine whether the
contents of the 1 gallon bottle are actually 1 gallon. It is known
from the specifications of water bottling companies that the
standard deviation of water content per bottle is 0.02 gallons. If
a random sample of 50 bottles is chosen, and the average sample of
water content per 1 gallon bottle is 0.995 gallons.
a. Is there any evidence that the average water content in bottles
is not the same as...

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