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ADM 515 Statistics Midterm Exam
Ans
1
23.
33.
2
What is the weighted mean profit per delivery?
$101
3
What is the difference between a sample and a population?
4
5
Which food results in a more uniform weight?
Fatso
6
0
7
Instructions: There are 9 questions/problems.
Points are as shown. You may use you
Post your answers in the digital drop box and please be cogent and please clearly ma
not discuss this exam with any other student.
All work MUST be shown on the approp
each appropriate box to the location cell on the specific worksheet that contains the an
your full work must be contained on the appropriate worksheet for full
a.
What is the frequency (as a percentage) for those salespersons earning between $1,600
and $1,799?
b.
What is the frequency (as a percentage) for those salespersons earning more than $
1,599?
A population consists of all cases that a statistician or researcher wants his or her inferences to be a
sample is a small subset of a population.
Typically, a statistician or researcher observes a small sam
order to make inferences or generalizations about a larger population.
If one knew everything abou
poulation to begin with, he or she would not need to make inferences based on samples.
The spread in the annual prices of stocks selling under $10 and the volume traded are to be compared.
The me
the stocks selling under $10 is $5.25 and the standard deviation is $1.52.
The mean volume traded is 125,000
standard deviation is 28,000.
Why should the coefficient of variation be used to compare the variation betwee
variables?
It would make little sense to attempt to compare the means of the two variables, because the units a
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 Spring '10
 Jeff
 Statistics

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