Which is the biggest advantage of the data flow approach over narrative explanations?
A) freedom from committing to the technical implementation of the system too early
B) further understanding of the interrelatedness of systems and subsystems
C) communicating current system knowledge of users through data flow diagrams
D) conceptual freedom found in the use of the four symbols
D
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In a typical, properly designed star schema, the number of records (rows) in any of the dimension tables is:
A) Larger than in the fact table B) Same as in the fact table C) Smaller than in the fact table D) No typical rule—there is an even number of dimension tables with larger, smaller and same number of records as in the fact table
A random sample of 60 business students required an average of 50.7 minutes to complete a statistics exam. Assume that the population standard deviation to complete the exam was 10.4 minutes
The standard error of the mean for this sample is ________.A) 0.63 B) 1.07 C) 1.34 D) 2.30