The American Water Works Association reports that the per capita water use in a single-family home is 62 gallons per day. Legacy Ranch is a relatively new housing development. The builders installed more efficient water fixtures, such as low-flush toilets, and subsequently conducted a survey of the residences. Twenty-seven owners responded, and the sample mean water use per day was 57 gallons with a standard deviation of 7.9 gallons per day.

At the 0.05 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 ≥ 62 and fail to reject H1: μ < 62 when the test statistic is less 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.)

B 62 gallons

Step-by-step explanation:

Legacy Ranch Is A Relatively New Housing Development. ... Association reports that the per capital water use in a single-family home is 62 gallons per day.

step-by-step explanation:

i believe its "c" because all of the other options include a but it could be d because there is a way of financing with cash at certain places but its uncommon.

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.