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Sonja [21]
3 years ago
5

An organization advocating for healthcare reform has estimated the average cost of providing healthcare for a senior citizen rec

eiving Medicare to be about $13,000 per year. The article also stated that, with 90% confidence, the margin or error for the estimate is $1,000. Determine the resulting 90% confidence interval for the average cost for healthcare of a senior citizen receiving Medicare.
Mathematics
1 answer:
asambeis [7]3 years ago
7 0

Using the definition of a confidence interval, it is found that the 90% confidence interval for the average cost for healthcare of a senior citizen receiving Medicare is ($12,000, $14,000).

A confidence interval is the <u>sample mean plus/minus the margin of error</u>.

  • In this problem, the sample mean is of $13,000.
  • The margin of error is of $1,000.

Hence:

$13,000 - $1,000 = $13,000

$13,000 + $1,000 = $14,000

The interval is ($12,000, $14,000).

A similar problem is given at brainly.com/question/24869727

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Cesar had a part-time job last year. He worked every week for the year and made $23 an hour. He worked 28 hours each week. Cesar
Naddika [18.5K]

Answer:

D. $2,511

Step-by-step explanation:

First off, we need to write down the facts we know.

There are about 52.177 weeks in a year

Cesar works 28 hours each week

Cesar makes $23 an hour

There are 12 months in a year

Cesar has $3,360 after his monthly expenses

To figure out how many hours are in a "work year," multiply the number of work hours in a week by the number of weeks in a year. In other words, multiply Cesar's 28 hour work week by about 52.177 weeks. That makes 1,456 hours in his work year. That means he makes $33,492 a year. If you multiply $2,511 by the months in a year (12), you get $30132. Finally, subtract his annual salary by $30132 to get $3,360, which is what was left of Cesar's earnings after paying all of his monthly expenses.

5 0
3 years ago
Read 2 more answers
You want to stain the lateral faces of the wooden chest shown. Find the area that you want to stain in square inches.
natali 33 [55]

The surface area of the cube-shaped wooden chest which has the side edges of 4 feet shown is 96 square inches.

<h3>What is the surface area of a cube?</h3>

Surface area of cube is the sum of the area of each face by which it is enclosed. The surface area of cube can be calculated with the following formula;

A=6a^2

Here, (<em>a</em>) is the length of side of the cube.

You want to stain the lateral faces of the wooden chest shown. Find the area that you want to stain in square inches.

A cube-shaped wooden chest with side edges of 4 feet. Thus the surface area of it is,

A=6a^2\\A=6(4)^2\\A=96\rm\; ft^2

Thus, the surface area of the cube-shaped wooden chest which has the side edges of 4 feet shown is 96 square inches.

Learn more about the surface area of cube here;

brainly.com/question/1091166

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3 0
2 years ago
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7.55 would be your answer
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3 years ago
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aliina [53]

Answer:

X is equal to 7

Step-by-step explanation:

Open parenthesis.

3/4x +63/4=21/2

take common denominator

3/4x=42/4-63/4

Solve

3/4x=-21/4

3x=21

x=7

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3 years ago
When you apply a power to a product of two or more terms, you __________ the exponent.
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You multiply the exponent
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