In: Statistics and Probability

Instructions: Provide answers to the problems below. Show all your works Exercise 1: Suppose 80% of the incoming email messages for a college’s computer system are spam. 1. Use the CLT to approximate the probability that in a random sample of 200 incoming email messages at this college, the sample proportion of these messages that are spam would exceed .75. 2. Display your answer to question 1 as a shaded area in a well-labeled sketch. 3. After implementing a new spam blocker, if it turns out that a random sample of 200 messages contains 75% spam, would this constitute fairly convincing evidence that the (population) percentage of spam has been reduced from 80%?Explain, based on your calculation in question 1. 4. Would your answer to question 1 be larger, smaller, or the same if the sample size were 100 messages rather than 200 messages? Explain briefly. 5. Would your answer to question 1 be larger, smaller, or the same if the (population) proportion of spam messages were .77 rather than .80? Explain briefly.

Instructions
1. Provide an original post with your answers to the questions
below and reply to at least two classmates. Do not upload a
document.
2. Do not repeat the questions in your post, but do number your
answers.
3. A complete answer post is several sentences in length, and
will: (1) define and explain the correct legal terms, rules, and
principles, (2) apply the legal rules and principles to the facts
in the question, (3) state a conclusion, and...

Part IV (30): Provide numerical answers for questions 1 through
5 below and show all your work. The band structure of an intrinsic
(Undoped) semiconductor is given by E(k) = k 2 + B (CB) E(k) =
-Ak2 (VB) A = 1 x 10-38 Joule-m2 , B = 1eV = 1.6 x 10-19 Joules 1.
What is the effective mass of the electrons and holes in this
semiconductor? 2. What is the instantaneous velocity of an electron
in the conduction...

Instructions:
Read the problemn and complete all the questions included
below.
Submit your answers on a Word (.doc) or Excel (.xls)
document
Check the Rubric
As a consultant for Acme Engineering you have been able to
establish the following parameters from their Financial
Statements:
Item
Amount
Cash
$200,000
Securities
$90,000
Accounts Receivable
$300,000
Inventories
$400,000
Prepaid Expenses
$16,000
Accounts Payable
$630,000
Other Liabilities
$180,000
Calculate the following parameters:
Total Assets
Total Liabilities
Working Capital
Current Ratio
Acid Test Ratio

Show all manual calculations and provide commentary to your
answers.
A company that manufactures bookcases finds that the average
time it takes an employee to build a bookcase is 10 hours with a
standard deviation of 2 hours. A random sample of 64 employees is
taken. What is the likelihood that the sample mean will be 9 hours
or more? The average grade point average (GPA) of undergraduate
students in New York is normally distributed with a population mean
of...

Instructions: Show all
your work to get partial credit. Answers without any work-even
correct-will not receive any credit. Good
Luck!
A firm is considering investing in a new project. According to
its cost of capital while using debt, preferred stock and new
common stock, the project is expected to have an initial after-tax
cost of $5,000,000. Furthermore, the project is expected to provide
after-tax operating cash flows of $1,800,000 in year 1, $2,900,000
in year 2, $2,700,000 in year 3...

Instructions: Show all calculations in detail.
No partial credit will be given for just answers.
3. An importer of Swiss watches has an account payable of
CHF750,000 due in 90 days. The following data is available:
Rates and prices in US-cents/CHF.
Spot rate: 71.42 cents/CHF
90-day forward rate: 71.14
cents/CHF
US –dollar 90-day interest rate: 3.75%
per year
Swiss franc 90-day interest rate:
5.33% per year
Option Data in cents/CHF
_______________________________
Strike
Call
Put
70
2.55
1.42
72
1.55 ...

7. Use the following information
to work Problems (a) and (b). Show all your workings. Suppose that
in response to huge job losses in the New Zealand textile industry,
the government of New Zealand imposes a tariff of 100 percent on
imports of textiles from China.
Explain how the tariff on textiles will change the price that
New Zealand pays for textiles, the number of textiles imported, and
the quantity of textiles produced in New Zealand.
Explain how the New...

1. Use the following information to work Problems (a) and (b).
Show all your workings.
Michael is an Internet service provider. On 31 December 2018, he
bought an existing business with servers and a building worth
$400,000. During his first year of operation, his business grew,
and he purchased new servers for $500,000. The market value of some
of his older servers fell by $100,000.
(a)What was Michael’s gross investment, depreciation, and net
investment during 2019?
(b)What is the value...

Complete the problems below. Show some of your steps and explain
the answer, too.
Question #1 (6 points)
A 95% confidence interval for a population proportion yielded
the interval (.345, .455).
Compute the margin of error.
Compute the sample proportion.
Will a 90% confidence interval be wider or narrower?
Explain.
Question #2 (6 points)
According to recent figures, 6% of college graduates (aged
21-24) are unemployed, which is the lowest rate since before the
recession. Suppose we take a random...

In the following questions, give all your answers to two
decimals.
Patrice works as an economist for the Bureau of Labor Statistics
(BLS). Her current project is to estimate the effect of changes in
income, prices of related goods, and the price of potatoes on the
demand for beef. Patrice has the following data:
Price elasticity of demand for beef
–0.80
Income elasticity of demand for beef
+ 1.40
Cross-price elasticity between beef and chicken
+1.20
Cross-price elasticity between beef...

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