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insens350 [35]
3 years ago
10

An economist is interested in studying the incomes of employees in a particular Silicon Valley firm. The population standard dev

iation is known to be $5000. What total sample size would the economist need to use for a 95% confidence interval if the width of the interval should not be more than $500:
A. 385
B.1536
C.1537
D. 384
Business
1 answer:
Komok [63]3 years ago
5 0

Answer:

Option C) 1537

Explanation:

We are given the following in the question:

Population standard deviation = $5000

95% confidence interval width = $500

Thus, margin of error = $250

Formula for margin of error =

z_{stat}\times \dfrac{\sigma}{\sqrt{n}}

z_{critical}\text{ at}~\alpha_{0.05} = 1.96

Putting values, we get,

250 = 1.96\times \dfrac{5000}{\sqrt{n}}\\\\n = (1.96\times \dfrac{5000}{250})^2\\\\n = 1536.64\\n \approx 1537

Thus, the correct answer is

Option C) 1537

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Explanation:

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The reason for the increase in money supply by $100000 is because the federal reserve bought bond of $100000 from Riggie Rich. This is an expansionary policy which will lead to more money in supply.

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3 years ago
A woman walks into a store and steals $100 she comes back and buys $70 worth of goods with the $100, the owner gives her$30 in c
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What will most likely cause a lender to deny credit?
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Answer:

A historic credit score of 300

Explanation:

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Credit scores range between 300 and 850. 300 is the lowest and the poorest score. A score of 300 indicates that the borrower has a bad history of debt repayment. They are always late on repayments,  miss on installments, or have defaulted on loans. Lenders consider such persons as high-risk borrowers and are likely to deny them credit facilities.

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Efram’s audience was persuaded by his speech because they perceived him to be sincere, trustworthy, and to have their best inter
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Answer:

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Answer: Option A

       

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