During a recent drought, a water utility in a certain town sampled 100 residential water bills and found that 80 of the residences had reduced their water consumption over that of the previous year. find a 98% upper confidence bound for the proportion of residences that reduced their water consumption. round the answer to three decimal places.

0.893

Step-by-step explanation:

Given : Sample size of residential water bills: n=100

Number of residences had reduced their water consumption over that of the previous year = 80

Then sample proportion:

Critical value for 98% confidence=

The upper bound for confidence interval for population proportion :

Hence, the 98% upper confidence bound for the proportion of residences that reduced their water consumption.=0.893

3,6 and 7.

step-by-step explanation:

a) unit place of 37 is 7

so the unit place of cube of 37 will be

7³= 343=3

the answer is 3.

b) unit place of 56 is 6, so the unit place of cube of 56 will be

6³= 216=6

the answer is 6.

c) unit place of 133 is 3, so the unit place of cube of 133 will be

3³= 27= 7.

the answer is 7.