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# Solution: Test Yourself Assignment 1232

DSS 560: Midterm.  Free Response portion

1.  East West Distributing is in the process of trying to determine where they should schedule next year’s production of a popular line of kitchen utensils that they distribute. Manufacturers in four different countries have submitted bids to East West. However, a pending trade bill in Congress will greatly affect the cost to East West due to proposed tariffs, favorable trading status, etc.

After careful analysis, East West has determined the following cost breakdown for the four manufacturers (in \$1,000’s) based on whether or not the trade bill passes:

• A manufacturing company is considering expanding its production capacity to meet a growing demand for its product line of air fresheners.  The alternatives are to build a new plant, expand the old plant, or do nothing.  The marketing department estimates a 35 percent probability of a market upturn, a 40 percent probability of a stable market, and a 25 percent probability of a market downturn.  Georgia Swain, the firm’s capital appropriations analyst, estimates the following annual returns for these alternatives:
1. What should the company do? (12 points/ 2 pts per calculation/decision)

Build New Plant

(0.35*690,000) + (0.4*-130,000) + (0.25*150,000) = \$152,000

Expand Old Plant

(0.35*490,000) + (0.4*-45,000) + (0.25*-65,000) = \$137,250

Do Nothing

(0.35*50,000) + (0.4*0) + (0.25*-20,000) = \$12,500

The expected value of building a new plant exceed the value of expanding old plant and doing nothing.

Answer – The company should Build New Plant

1. What returns will accrue to the company if your recommendation is followed? (4points)

Market Upturn = 0.35*690,000 = \$241,500

Stable Market = 0.4*130,000 = (\$52,000)

Market Downturn = 0.25 * 150,000 = (\$37,500)

If the company decides to build a new plant, the return will either be

\$241,500, (\$52,000), or (\$37,500)

• A calculus instructor uses computer aided instruction and allows students to take the midterm exam as many times as needed until a passing grade is obtained. Following is a record of the number of students in a class of 20 who took the test each number of times.

Solution

a). Relative Frequency = Frequency (students) / Total Population * 100

Total population = 10 + 7 + 2 +1 = 20

10 students = 10 / 20 * 100 = .50

7 students = 7 / 20 * 100 = .35

2 students = 2 / 20 * 100 = .10

1 student = 1 / 20 * 100 = .05

b). Probability of each event frequency * number of tests taken

(.50*1) + (.35*2) + (.10*3) + (.05*4) = 1.7

c). Variance

Variance = (Σfx2 / Σf ) – (Σfx / Σf)2

3.6 / 1 – (1.7 / 1)2 = 0.71

d). Standard deviation = √Variance

Variance = 0.71

√0.71 = 0.8426

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