Data Analysis Basics
Test your understanding about data analysis tools like descriptive, inferential, and bivariate
Which of the following BEST differentiates data analysis from interpretation?
Interpretation requires more conceptual and integrative thinking than data analysis.
Interpretation involves computerized analysis of data.
Data analysis is explanatory and interpretation is conceptual.
Data analysis involves conceptualization but interpretation does not.
R2 is known as the:
Multiple correlation coefficient.
Coefficient of determination.
Partial correlation coefficient.
Semi-partial correlation coefficient.
A summary measure that is computed from only a sample of the population is called
The scientific method.
When the correlation coefficient, r, is close to one:
there is no relationship between the two variables
there is a strong linear relationship between the two variables
it is impossible to tell if there is a relationship between the two variables
the slope of the regression line will be close to one
The process of using sample statistics to draw conclusions about population parameters is called
A correlation of .7 was found between time spent studying and percentage on an exam. What is the proportion of variance in exam scores that can be explained by time spent studying?
Ordinal level data are characterized by:
Data that can be meaningfully arranged by order of magnitude.
Equal intervals between each adjacent score.
A fixed zero.
None of the above.
In analysing categorical data, the following graphical device is not appropriate
Stem and leaf display.
The intercept in linear regression represents:
the strength of the relationship between x and y
the expected x value when y is zero
the expected y value when x is zero
a population parameter
The number of Indians travelling to work by car today is an example of
discrete numerical data.
continuous numerical data.
discrete categorical data.
If Pearson’s correlation coefficient between stress level and workload is .8, how much variance in stress level is not accounted for by workload?
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