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Tamu Stat 211 Exam 1 2025 Questions And Answers

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Define: categorical variable - ANS variable that takes values in one of several categories ex: gender, race, major Define: quantitative variable - ANS variable that takes numerical values where arithmetic makes sense ex: age, SAT score, time until arrival Define: observational study - ANS Passive data collection. Nothing is done to influence the variables on the units in the sample. tends to be more cost effective Define: experiment - ANS Treatment is applied to some units. Variables on units are measured with the intention of determining if the treatment affects the variables. Whats the difference between a histogram and a bar graph? - ANS Histogram bars touch and their width is rela

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TAMU STAT 211 EXAM 1 2025
QUESTIONS AND ANSWERS




Define: categorical variable - ANS variable that takes values in one of several categories


ex: gender, race, major



Define: quantitative variable - ANS variable that takes numerical values where arithmetic
makes sense


ex: age, SAT score, time until arrival



Define: observational study - ANS Passive data collection. Nothing is done to influence the
variables on the units in the sample.


tends to be more cost effective



Define: experiment - ANS Treatment is applied to some units. Variables on units are
measured with the intention of determining if the treatment affects the variables.



Whats the difference between a histogram and a bar graph? - ANS Histogram bars touch and
1




their width is related to the value range, used for quantitative data
Page




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