mike bayville business analysis

To form a __________ we form a ratio between each frequency and the total number of scores in the set.

A. stem-and-leaf display  
B. frequency distribution  
C. relative frequency distribution  
D. frequency polygon  

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Question 2 of 20
5.0 Points
Please use the following to answer questions 2-3:

 

Class Scores Frequency (f)
(lower limit < value < upper limit)  
0-20 6
20-40 9
40-60 15
60-80 12
80-100 8

 

What is the relative frequency of the 20–40 class?

A. 0.30  
B. 0.18  
C. 0.225  
D. 9  

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Question 3 of 20
5.0 Points
What is the percent frequency of the 60-80 class?

A. 12%  
B. 24%  
C. 30%  
D. 84%  

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Question 4 of 20
5.0 Points
For Questions 4-7, use the following data:

The number of file conversions performed by a processor per day for 10 days was:

15, 27, 25, 28, 30, 31, 22, 25, 27, 29

What is the arithmetic mean of the data?

A. 20.7  
B. 25.9  
C. 27  
D. 29  

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Question 5 of 20
5.0 Points
What is the trimmed mean of the data?

A. 22.875  
B. 26.625  
C. 31.525  
D. 34.375  

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Question 6 of 20
5.0 Points
What is the median of the data?

A. 26  
B. 26.5  
C. 27  
D. There is no median for this data set.  

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Question 7 of 20
5.0 Points
What is the mode of the data?

A. 25  
B. 25  
C. There is no mode for the data set.  
D. The data set is bimodal, with modes of 25 and 27.  

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Question 8 of 20
5.0 Points
Sample data on employee age for a large auto parts manufacturer are as follows:

 

Employee Age Frequency
25-29 25
30-34 33
35-39 62
40-44 26
45-49 31
50-54 8

 

What is the mean age of the employees?

A. 37  
B. 37.32  
C. 37.78  
D. 38.83  

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Question 9 of 20
5.0 Points
A survey of the number of television sets per household in a city yielded the following results:

 

Number of TV Sets Number of Households
1 400
2 800
3 400
4 100

 

What is the trimmed mean of the number of televisions per household?

A. 425  
B. 200  
C. 340  
D. 725  

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Question 10 of 20
5.0 Points
For questions 10-13, use the following data:

13 29 41 60 89 14 26 53 7 14

What is the arithmetic mean of the data?

A. 20  
B. 14  
C. 34.6  
D. 82  

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Question 11 of 20
5.0 Points
What is the range of the data?

A. 14  
B. 34.6  
C. 82  
D. 50  

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Question 12 of 20
5.0 Points
What is the variance of the data?

A. 231.04  
B. 616.64  
C. 685.16  
D. 1,197.16  

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Question 13 of 20
5.0 Points
What is the standard deviation of the data?

A. 0.2  
B. 26.18  
C. 24.83  
D. 34.61  

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Question 14 of 20
5.0 Points
A probability is always expressed as a value from:

A. 0 and 1.  
B. -1 and 1.  
C. 0 and 100.  
D. 0 and 10.  

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Question 15 of 20
5.0 Points
Records at a high school indicate that each year for the past five years, 120 of the 1,500 students were absent on the first day of hunting season. What is the likelihood that a particular student will be absent on the first day of hunting season this year?

A. 0.08  
B. 0.12  
C. 0.18  
D. 0.20  

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Question 16 of 20
5.0 Points
A study of a manufacturing process indicates that 120 of 6,000 units produced are defective. If a sampler selected 100 units, how many defective units would he expect to be present?

A. 2  
B. 5  
C. 6  
D. 10  

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