The closest to the minimum number of consumers needed to obtain the estimate with the desired precision is (b) 271
Explanation:
When the prior estimate of population proportion is not given , then the formula to find the sample size is given by :-

where E = Margin of error.
z* = Critical z-value.
As per given , we have
E = 5%=0.05
Confidence level = 90%
The critical value of z at 90% is 1.645 (By z-table)
Put all values in the formula , we get
n=0.25(1.645/0.05)²
n=0.25(32.9)²
n=270.6025≈271
Thus, the minimum sample size needed = 271
Hence , the correct answer is 271 .
Natural monopoly tends to serve a whole market exclusively.
<h2>What is Natural Monopoly?</h2>
A natural monopoly is a sort of monopoly that frequently arises as a result of the high start-up costs or considerable economies of scale of operating a business in a particular industry, which can result in significant barriers to entry for potential competitors. In a certain sector or region, a corporation with a natural monopoly might be the exclusive supplier of a given good or service. In industries that need specialized technology, raw materials, or other elements to function, natural monopolies may develop.
<h3>Key Features of Natural Monopoly</h3>
- A natural monopoly is a special kind of monopoly that develops when there is only one company that can effectively provide the service in a particular area due to high start-up costs and considerable economies of scale.
- A business with a natural monopoly may be the exclusive supplier of a good or service in a given sector or region.
- Natural monopolies are permitted when one firm can provide a good or service for less money than any potential rival, but they are frequently very tightly controlled to safeguard consumers.
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Answer:
B
Explanation:
I believe it is the interest rate the federal reserve uses for loaning to banks. Its the minimal rate, also.
Answer: his or her unique values and benefits
Explanation: I just got it right