Which of the following are true about the variance of a random variable?
it depends on the number n of data values acquired in an experiment |
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it has the same units as X |
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it can be calculated as [ E(X*X) – u*u ], where u is the expected value of X |
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it depends on n-1, where n is the number of data values acquired in an experiment |
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it can be calculated as the square root of [ E(X*X) – u*u ], where u is the expected value of X |
Which of the following are true about thinking? I. It refers to the mental activity that goes on in the brain when a person is organizing and attempting to understand information and communicating information to others. II. It is a role-playing model that serves as a team-based problem solving and brainstorming technique that can be used to explore problems and solutions and uncover ideas and options that might otherwise be overlooked by a homogeneously thinking group. III. It transforms a particular representation of information into new and different forms, allowing us to solve problems, comparing it to other information, or making decisions.
Which of the following are true regarding activity-based
costing?
a. A primary goal of using ABC is a more useful alloca-
tion of manufacturing overhead to product lines.
b. Under ABC, direct labor hours are never used to allo-
cate overhead costs to activity pools or product lines.
c. The use of ABC is indicated when it is suspected that
each of a firm’s product lines consumes approximately
the same amount of overhead resources but the current
allocation scheme assigns each line a substantially dif-
ferent amount.
which of the following are True or false?
One way to distinguish goods from services is that services are inseparable from their service providers.
Compared to first adopters, later adopters tend to be more highly educated, younger, and more willing to take risks on new technologies.
The main factors involved in determining a product’s markup are the inventory turnover rate and the services performed by the retailer.
A marketing channel is an organized system of marketing institutions and their interrelationships that promote the physical flow and ownership of products from producers to consumers.
General merchandise retailers distinguish themselves from specialty and limited-line retailers by the large number of product lines they carry.
In the case of convenience stores, customers usually compare prices, assortments, and quality levels at competing outlets before making purchase decisions.
A wholesaler is an intermediary that takes title to the goods it handles and then distributes these goods to retailers, other distributors, or sometimes end consumers.
Which of the following are true statements about velocity, acceleration, and force?
(More than one answer)
A |
All three of these quantities are vectors. |
|
B |
Force always causes velocity to increase. |
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C |
Acceleration always causes velocity to increase. |
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D |
Acceleration is a change in force per unit time. |
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E |
Force and acceleration are related by a law of nature; acceleration and change in velocity are related by a definition. |
|
F |
Velocity is not a vector, but force and acceleration are vectors. |
|
G |
Force = mass times velocity |
|
H |
Acceleration and net force are always in the same direction, but velocity can be in any relative direction to those. |
|
I |
Force and acceleration are related via mass. |
|
J |
Newton’s Second Law of Motion says that: acceleration = mass times force |
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