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r-ruslan [8.4K]
2 years ago
7

An environmental journal discussing current water usage within us reports a 95% confidence interval of (82,88) for the average n

umber of household gallons used per person per day . the study was based on a random sample of 30 individuals throughout the nation. determine the average useage of the 30 individuals sampled
Mathematics
1 answer:
Yuliya22 [10]2 years ago
8 0

Answer:

The average useage of the 30 individuals sampled is 85 gallons per day

Step-by-step explanation:

A confidence interval has two bounds, the lower bound and the upper bound.

A confidence interval is symmetric, which means that the sample mean is the halfway point between these two bounds, that is, the sum of them divided by two.

In this problem, we have that:

Lower bound: 82

Upper bound: 88

Determine the average useage of the 30 individuals sampled

(82 + 88)/2 = 85

The average useage of the 30 individuals sampled is 85 gallons per day

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Sophie [7]

Step-by-step explanation:

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Hope these helps. There are many other important factors as well. You can ask any time for any help in this. Would be glad to help. :)

8 0
2 years ago
Read 2 more answers
Sara was thinking of a number. Sara halves the number and gets an answer of 38.5. Form an equation with x for the information
lbvjy [14]

Answer:The equation wth x in the information can be written as

1/2 x = 38.5 , Upon solving, the number = 77

Step-by-step explanation:

Let the number Sara was thinking about be x

halving the number to get an answer = 38.5 can be expressed as

 1/2 X = 38.5

The equation with x in the information can be written as

1/2 x = 38.5

solving it becomes

1/2 x= 38.5

x = 38.5 x 2

x=77

The number Sara was thinking about = 77

4 0
2 years ago
Angela and you are painting a room. Angela has 2 1/2 gallons of blue paint and Ryou has half as much white paint. It will take 2
GREYUIT [131]
Conversion from gallons to quarts

1 gallon = 4 quarts

Now,

Angela has 2 \frac{1}{2} gallons = 2\frac{1}{2} *4 = 10 quarts of blue paint

Ryou has 1/2 of what Angela has = 1/2*10 = 5 quarts of white paint.

Each wall requires 2 \frac{3}{4} of paint.
After coloring;
Blue colored walls = (10)/(2 \frac{3}{4}) = 3 walls with 7/11 quarts of paint remaining.
White colored walls = (5)/(2 \frac{3}{4}) = 1 wall with 9/11 quarts of paint remaining
6 0
3 years ago
Classify the polynomial 2x^3+6x^2-4 by the number of terms. binomial. trinomial. cubic. quadratic.
sashaice [31]

Answer:

monomial

Step-by-step explanation:

3 0
2 years ago
GH=4x-1 and DH=8. Find x<br> D is the mid point of GH ...?
dezoksy [38]
If D is the midpoint of GH, then GH equals 2(DH) = 16
16 = 4x - 1
4x = 17
x = 17/4
x = 4.25
3 0
3 years ago
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