SOLUTION:
The American Water Works Association reports that the per capita water use in a single family home is 70 gallons per day. Legacy Ranch is a relatively new housing development con
Algebra.Com
Question 630774:
The American Water Works Association reports that the per capita water use in a single family home is 70 gallons per day. Legacy Ranch is a relatively new housing development consisting of 100 homes. The builders installed more efficient water fixtures, such as low flush toilets, and subsequently conducted a survey of the residences. Thirty-six homes responded, and the sample mean water use per day was 68 gallons with a standard deviation of 7.8 gallons per day.
At the .05 level of significance, is that enough evidence to conclude that residents of Legacy Ranch use less water on average?
(a)
What is the decision rule? (Negative amount should be indicated by a minus sign. Round your answer to 3 decimal places.)
Reject H0 : μ ≥ 70 and fail to reject H1 : μ < 70 when the test statistic is less than more than .
(b)
The value of the test statistic is . (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
(c)
What is your decision regarding H0?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
Clear out the dead space. This question is long enough with out the blank spaces.
RELATED QUESTIONS
The average American uses 100 gallons of water each day. Write an equation that gives the (answered by TimothyLamb)
Assume that the per capita consumption of bottled water in the United States is... (answered by ikleyn)
In 2001, U.S. per capita consumption of bottled water was 18.8 gallons, and in 2006, U.S. (answered by richwmiller)
the five connors use 210 gallons of water a week just for bathing . how much water does... (answered by tommyt3rd)
Assume that the per capita consumption of bottled water in the United States is... (answered by ikleyn)
during the summer months, a town restricts the water each family uses 250 gallons of... (answered by FrankM)
The average family of four uses about 300 gallons of water per day. How much water is... (answered by ikleyn)
Americans drank an average of 23.2 gallons of bottled water per capita in 2004. If the... (answered by Boreal)
An acre foot of water is 325,851 gallons, which is enough to meet the water needs of... (answered by rfer,ewatrrr)