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o-na [289]
3 years ago
8

American energy review reported that 27% of american households burn wood. if a random sample of 500 american households is sele

cted find the mean, variance, and standard deviation of the number of households that burn wood.
Business
1 answer:
Juli2301 [7.4K]3 years ago
4 0

This is binomial distribution problem. <span>
We are given that:</span>

n = sample size = 500

p = proportion which burns wood = 0.27,

q = proportion which does not burn wood = 1-p = 0.73 

<span>
A. Mean is calculated as:</span>

Mean = n*p

Mean = 500 * 0.27

Mean = 135 

<span>
B. Variance is calculated as:</span>

Variance = n*p*q

Variance = 500*0.27*0.73

Variance = 98.55 

<span>
C. Standard deviation is calculated as:</span>

Standard deviation = sqrt(variance)

Standard deviation = sqrt(98.55)

<span>Standard deviation = 9.93</span>

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A quality control activity analysis indicated the following four activity costs of a hotel:
svet-max [94.6K]

The Cost of Quality Report is as follows:

Quality Cost                 Quality     Percentage of                  Percentage of

Classification                  Cost        Quality Cost                      Total Sales

Prevention                  $98,600     20% ($98,600/$493,000)     3.4%

Appraisal                       49,300     10% ($49,300/$493,000)       1.7%

Internal Failure           246,500     50% ($246,500/$493,000)  8.5%

External Failure            98,600     20% ($98,600/$493,000)     3.4%

Total Quality Costs $493,000     100%                                       17.0%

Data and Calculations:

Inspecting cleanliness of rooms                             $49,300 (Appraisal)

Processing lost customer reservations                   98,600 (External failure)

Rework incorrectly prepared room service meal 246,500 (Internal failure)

Employee training                                                    98,600 (Prevention)

Total                                                                     $493,000

Sales                                                                 $2,900,000

Percentage of Quality Cost = Quality Cost/Total Quality Cost * 100

Percentage of Total Sales = Quality Cost/Total Sales * 100

Thus, the cost of quality report is an appraisal of how the hotel uses its resources to prevent poor quality, including its internal and external failures.

Learn more about cost of quality report here: brainly.com/question/23775957

4 0
2 years ago
Farrell wants to retire in six years. To have sufficient assets to fund retirement, Farrell needs to accumulate an additional $4
Mademuasel [1]

Answer:

$73,070.5

Explanation:

Inflation erodes the value of money. It makes more quantity of money to required to buy the same basket of food and services in the future.

With inflation, to calculate the the quantity of Dollars needed in n years time, we use the formula;

Inflated amount = h × (1 + f)^n

h= amount required today, f - inflation rate, n- number of years

So if Farrell needs $400,000 in 6 years time in real terms, with an inflation of 5% per year, he would need to have a quantity of money equal to

1.05^6 × 400,000 = $536,038.3.

To provide for $536,038.3  in 6 years time, he would need to contribute into a sinking fund on a yearly basis, an equal amount denoted as "A" in the formula below:

FV = A ×  ((1+r)^n  - 1)/r

FV - 536,038.3, r - 8%, n = 6

536,038.3 = A × ((1+0.08 )^(6) - 1)/0.08)

536, 038.3 = A × 7.3359

536,038.3/7.3359 = A

$73,070.5  = A

Farrell should invest at the end of every year

$73,070.5

7 0
3 years ago
Central City needs to have an income of $3,560,000. The total property is valued for taxation at $92,000,000.What is the tax rat
asambeis [7]

Answer:

3.87%

Explanation:

Data provided in the question:

Income needed by the central city = $3,560,000

Total Value of the property for the taxation = $92,000,000

Now,

The income needed by  the central city = Tax collected

or

The income needed by  the central city = Total Value of the property for the taxation × Tax rate

or

$3,560,000 = $92,000,000 × Tax rate

or

Tax rate = $3,560,000 ÷ $92,000,000

or

Tax rate = 0.0387

or

Tax rate = 0.0387 × 100%

= 3.87%

5 0
3 years ago
Which of the following factors can impede decision making in an incident?
Dahasolnce [82]
the answer is C. fatigue and stress

The productivity of our mind and body go hand in hand. If one of them doens't function well, it will affect the other.

If our body and our mind is under a lot of pressure, we simply can't make the best decisions
6 0
3 years ago
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Based on the law of demand, when the price of a specific good decreases, what will happen to the quantity demanded?
NNADVOKAT [17]

actually the right answer is it will increase. got proof too.  ;)

ik its a little late but you know... better to give you the right answer though then get it wrong

6 0
3 years ago
Read 2 more answers
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