A city planner wants to estimate the average monthly residential water usage in the city. He selected a random sample of
Posted: Wed May 11, 2022 7:16 am
A city planner wants to estimate the average monthly residential
water usage in the city. He selected a random sample
of 39 households from the city, which gave the mean water
usage to be 3411.80 gallons over a one-month period.
Based on earlier data, the population standard deviation of the
monthly residential water usage in this city
is 387.60 gallons. Make a 95% confidence interval
for the average monthly residential water usage for all households
in this city.
Round your answers to two decimal places.
water usage in the city. He selected a random sample
of 39 households from the city, which gave the mean water
usage to be 3411.80 gallons over a one-month period.
Based on earlier data, the population standard deviation of the
monthly residential water usage in this city
is 387.60 gallons. Make a 95% confidence interval
for the average monthly residential water usage for all households
in this city.
Round your answers to two decimal places.