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Orlov [11]
2 years ago
15

How to know if true or false?? HELP ASAP thank you! picture added.

Mathematics
1 answer:
Tom [10]2 years ago
7 0
True
Because a negative square root is an i
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the water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day.
marin [14]

To determine the average water use, 109 people must be sampled.

1.9 gallons is the standard deviation.

E = 0.15 gallons maximum error

1.9 gallons on average

90% is the critical value.

1.645 is the 90% confidence interval.

sample size requirement,

n = (((z ÷ 2) × σ) ÷ E)²

n = (((1.645 ÷ 2) × 1.9) ÷ 0.15)²

n = ((0.8225 × 1.9) ÷ 0.15)²

n = (1.5627 ÷ 0.15)²

n = (10.418)²

n = 108.53 ≈ 109

As a result, the minimal sample size necessary to determine the mean water use = 109.

It is determined by dividing the average standard error by the squared of the sample size, and it decreases with increasing sample size. In other words, when the sample size is sufficiently big, the population mean approaches the population mean.

To learn more about the sample interval at

brainly.com/question/13664567?referrer=searchResults

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8 0
1 year ago
Find the range of each function for the given domain-
aleksklad [387]

Answer:

42

90

Step-by-step explanation:

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7 0
3 years ago
18.25 × 17.25= show my work
abruzzese [7]
You would get 314.8125
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3 years ago
It takes a machine 15 hour to assemble a toy.
solniwko [45]
12 toys. Dividing 15 by 60 equals 4 so 4 tots in a hour. Then multiple the 4 toys an hour by 3 hours.
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Help with finding the area
Sever21 [200]
Base times height  and you have your answer

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