Question 1

In what circumstances should data be grouped in frequency distributions? How does one determine which groups should be used?

Accepted Answer

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Question 2

Consider the use of bar charts,histograms,and frequency polygons.When are each appropriate? Sketch each type of graph.What standards exist for presenting graphic data in social research?

Accepted Answer

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Question 3

Compute three measures of central tendency and two measures of variability for the following data set: When asked their age,10 college students responded: 21,19,20,18,18,19,33,22,19,and 18.Given this distribution,which measures of central tendency and variability are most appropriate? Explain your decision,drawing a graph or creating a frequency distribution as necessary.

Accepted Answer

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Question 4

Explain the logic and components of regression analysis.What is the purpose of the correlation coefficient? A scatterplot?

Accepted Answer

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Question 5

Range is computed by subtracting the highest value from the lowest value and adding 1.

Accepted Answer

Range is computed by subtracting the highest value from the lowest value and adding 1.

Question 6

Name at least three circumstances in which it is appropriate to add a third variable into a cross-tabulation.Why would you do each? What features of the bivariate relationship could be demonstrated using a three-variable crosstab?

Accepted Answer

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Question 7

How can statistics be unethically manipulated? Outline the specific ethical considerations associated with using statistics for social data analysis.

Accepted Answer

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Question 8

Describe situations in which a variable's variability is best measured by the range,interquartile range,and standard deviation,providing at least two concrete examples of each.

Accepted Answer

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Question 9

How are the properties of a normal curve important for analyzing data?

Accepted Answer

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Question 10

Researchers usually evaluate skewness by eyeballing the distribution.

Accepted Answer

Researchers usually evaluate skewness by eyeballing the distribution because it is a quick and easy way to get a general idea of the shape of the distribution. However, eyeballing the distribution is not as accurate as using a statistical test to measure skewness.

Question 11

When using primary data,what steps must be taken to ensure that the data quality is high,both during data entry and during data cleaning stages? What technologies facilitate both?

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Question 12

Describe circumstances in which mean,median,and mode are best used as measures of central tendency,providing at least two concrete examples for each.

Accepted Answer

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Quiz 9: Quantitative Data Analysis

In what circumstances should data be grouped in frequency distributions? How does one determine which groups should be used?

Consider the use of bar charts,histograms,and frequency polygons.When are each appropriate? Sketch each type of graph.What standards exist for presenting graphic data in social research?

Explain the logic and components of regression analysis.What is the purpose of the correlation coefficient? A scatterplot?

Range is computed by subtracting the highest value from the lowest value and adding 1.

Name at least three circumstances in which it is appropriate to add a third variable into a cross-tabulation.Why would you do each? What features of the bivariate relationship could be demonstrated using a three-variable crosstab?

How can statistics be unethically manipulated? Outline the specific ethical considerations associated with using statistics for social data analysis.

Describe situations in which a variable's variability is best measured by the range,interquartile range,and standard deviation,providing at least two concrete examples of each.

How are the properties of a normal curve important for analyzing data?

Researchers usually evaluate skewness by eyeballing the distribution.

When using primary data,what steps must be taken to ensure that the data quality is high,both during data entry and during data cleaning stages? What technologies facilitate both?

Describe circumstances in which mean,median,and mode are best used as measures of central tendency,providing at least two concrete examples for each.