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

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