Engineering Economy (17th Edition)
17th Edition
ISBN: 9780134870069
Author: William G. Sullivan, Elin M. Wicks, C. Patrick Koelling
Publisher: PEARSON
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Question
Chapter 3, Problem 21P
(a):
To determine
Calculate the cost.
(a):
To determine
Calculate the new cost.
Expert Solution & Answer
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Students have asked these similar questions
a) Determine the variable cost per unit and the fixed cost using the high-low method.b) What is the equation of the total mixed cost function?c) Prepare the scatter diagram and insert the trendline or line of best-fit. Use a scaleof 2 cm to represent 1,000 units on the x-axis & 2 cm to represent $50,000 on the yaxis.
1. Exercise 9.1
A study of 86 savings and loan associations in six northwestern states yielded the following cost
function.
2.38
0.006153Q
0.000005359Q²
19.2X1
C
+
+
(2.62)
(2.84)
(3.16)
(3.50)
where C = average operating expense ratio, expressed as a percentage and defined as total
operating expense ($ million) divided by total assets ($ million) times 100 percent.
Q = output; measured by total assets ($ million)
X1 = ratio of the number of branches to total assets ($ million)
Note: The number in parentheses below each coefficient is its respective t-statistic.
Which of the variable(s) is (are) statistically significant in explaining variations in the average
operating expense ratio? (Hint: t0.025,7€ 1.99
.) Check all that apply.
X1
Q2
What type of average cost-output relationship is suggested by these statistical results?
Quadratic
Linear
Cubic
Based on these results, what can we conclude about the existence of economies or diseconomies
of scale in savings and loan associations in…
2. Exercise 9.2
A study of 86 savings and loan associations in six northwestern states yielded the following cost function.
C
3.41
(3.41)
0.007384Q
(2.84)
0.000005359Q2
(3.16)
23.0X1
(3.23)
where C = average operating expense ratio, expressed as a percentage and defined as total operating expense ($ million) divided by total assets ($
million) times 100 percent.
Q = output; measured by total assets ($ million)
X₁ = ratio of the number of branches to total assets ($ million)
Note: The number in parentheses below each coefficient is its respective t-statistic.
Holding constant the effects of bank branching (X1), what is the level of total assets that minimizes the average operating expense ratio?
$1,557.42 million
O $688.93 million
$461.81 million
$1,377.87 million
What is the average operating expense ratio for a savings and loan association with the level of total assets determined in the previous part and 1
branch?
1.18%
0.90%
4.94%
3.44%
What is the ratio with 10 branches instead?…
Chapter 3 Solutions
Engineering Economy (17th Edition)
Ch. 3 - A green (environmentally friendly) office building...Ch. 3 - You are planning to build a new home with...Ch. 3 - Prob. 3PCh. 3 - Prob. 4PCh. 3 - Prob. 5PCh. 3 - Prob. 6PCh. 3 - Prob. 7PCh. 3 - Prepare a composite (weighted) index for housing...Ch. 3 - Prepare a composite (weighted) index for housing...Ch. 3 - Prob. 10P
Ch. 3 - Prob. 11PCh. 3 - Prob. 12PCh. 3 - Prob. 13PCh. 3 - The capital investment cost for a...Ch. 3 - The capacity of a switch grass-fueled ethanol...Ch. 3 - Prob. 16PCh. 3 - The time to assemble the first unit on a...Ch. 3 - Prob. 18PCh. 3 - For the data below (3.4 .3) a. Find the regression...Ch. 3 - A company that manufactures shuttle cars and mines...Ch. 3 - Prob. 21PCh. 3 - Prob. 22PCh. 3 - Prob. 23PCh. 3 - Prob. 24PCh. 3 - Prob. 25PCh. 3 - Prob. 26PCh. 3 - Prob. 28SECh. 3 - Prob. 31CSCh. 3 - Prob. 32CSCh. 3 - Prob. 36FECh. 3 - Prob. 37FECh. 3 - Prob. 38FECh. 3 - Prob. 39FECh. 3 - Prob. 40FECh. 3 - Prob. 41FE
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