1. An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another...

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1. An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula. When the test is completed, the researchers determine the mean elapsed time before a cockroach was killed by each product.I. What is the population?II. What is the sample?III. Is the study observational or experimental? Justify your answer.IV. If observational, identify ALL variables. If experimental, identify ALL independent and dependent variables.V. For each of the variables identified in part IV, list which of the four levels/scales of measurement was used to obtain data on these variables?VI. Classify each of the variables identified in part IV as either attribute or numerical. (Points : 10)2) 2. Classify the following variable as nominal, ordinal, discrete, or continuous and state why it is such a variable:religious affiliation (Points : 3)3. Classify the following as an example of a nominal, ordinal, interval, or ratio level of measurement, and state why it represents this level:rankings of the top ten best-selling authors (Points : 3)4. Construct a frequency distribution table to organize the following set of data: XXXXXXXXXX XXXXXXXXXX XXXXXXXXXX XXXXXXXXXX (Points : 5)5. Construct a grouped frequency distribution for the following 28 scores using a class width of 4: XXXXXXXXXX XXXXXXXXXX65 XXXXXXXXXX XXXXXXXXXX71 (Points : 5)6. Provide a different example for each of the following types of variables from your work or home life:A) A continuous variableB) An ordinal level of measurement (Points : 4)
	
Document Preview: 1. An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula. When the test is completed, the researchers determine the mean elapsed time before a cockroach was killed by each product.  I. What is the population?II. What is the sample?III. Is the study observational or experimental?  Justify your answer.IV. If observational, identify ALL variables.  If experimental, identify ALL independent and dependent variables.V. For each of the variables identified in part IV, list which of the four levels/scales of measurement was used to obtain data on these variables?VI. Classify each of the variables identified in part IV as either attribute or numerical. (Points : 10)2) 2. Classify the following variable as nominal, ordinal, discrete, or continuous and state why it is such a variable:religious affiliation (Points : 3)3. Classify the following as an example of a nominal, ordinal, interval, or ratio level of measurement, and state why it represents this level:rankings of the top ten best-selling authors (Points : 3) 4. Construct a frequency distribution table to organize the following set of data:109   114   111   109   109   106   110   114   114   112   111   110   114   114   110   113   114   105   107   107 (Points : 5)5. Construct a grouped frequency distribution for the following 28 scores using a class width of 4:84   82   87   74   77   72   85   72   80   82   66   69   67   65   80   75   70   69   67   78   65   88   72   84   65   75   79   71 (Points : 5)6. Provide a different example for each of the following types of variables from your work or home life:A) A continuous variableB) An ordinal level of measurement (Points : 4)

David · Accepted Answer

2048-11
Question: 
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)
1
 An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula. When the test is completed, the researchers determine the mean elapsed time before a cockroach was killed by each product.  
I. What is the population?
II. What is the sample?
III. is the study observational or experimental? Justify your answer.
IV. If observational, identify ALL variables.  If experimental, identify ALL independent and dependent variables.
V. For each of the variables identified in part IV, list which of the four levels/scales of measurement was used to obtain data on these variables?
VI. Classify each of the variables identified in part IV as either attribute or numerical.
Solution: 1(
I
).The population is all cockroaches.
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)
II.
The samples are two sets of 10,000 cockroaches 
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20,000
in the study.
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)
III
The study is experimental, because the subject are randomly assigned to different conditions, Therefore; the variables are manipulated and possible confounding variables are factored out.
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IV
The study is experimental,
     Independent variable: Different products used,
     Dependent variable    : Time elapsed i.e. time before cockroaches are killed and in distress.
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)
V
The four levels/scales of measurement was used to obtain data on these variables is given below,
    Product used: Nominal,
    Time elapsed: Ratio,
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VI
Product used: Attribute,
                          Time: Ratio,
Question:
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2
 Classify the following variable as nominal, ordinal, discrete, or continuous and state why it is such a variable: religious affiliation.
Solution: 
(
)
2
  This is nominal variable since religions are names which cannot be ordered (by an objective outsider).
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1. An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula. When the test is completed, the researchers determine the mean elapsed...

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