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Stats 101 - Quiz #1 (Week 1 & 2) With Complete Solutions
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Stats 101 - Quiz #1 (Week 1 & 2) With Complete Solutions
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Stats 101 - Quiz #1 (Week 1 & 2) WithComplete Solutions
Statistics Answer: the science of collecting, classifying, analyzing and interpreting information
-often thought of as numerical descriptions
Population Answer: larger set of data/units in which we are interested in
- (N)
Sample Answer: selection of data (not always representative)
- a subset of the units of a population
- (n)
Sampling Answer: the process of selecting data
Descriptive Statistics Answer: numerical and graphical methods to explore (or represent),
summarize and present data in convenient form
ex: StFX is the top school for profs knowing your name
Inferential Statistics Answer: estimates, decisions, predictions or other generalizations about a
larger set of data (population)
ex: ads online being specific to an individual
, Experimental/Observational Unit Answer: an object (person, event) that we are collecting data for
Variable Answer: a characteristic or property of the unit (that varies among the units of the
population)
-can take on many meanings
Census Answer: measuring a variable for every experimental unit of a population
ex: class (population), take a census of everyone's age
Statistical Inference Answer: an estimate or prediction or some other generalization about a
population based on information contained in a sample
- using info contained in the sample to learn something about the population
Measurements Answer: the processes used to categorize and/or quantify variables and are
represented in types (quan or qual) and scales (nominal, ordinal, interval or ratio)
- all measurements will be one type of data and on one scale
Qualitative Data Answer: - aka categorical
- measurements that cannot be represented numerically and must be described, classified into
descriptive categories
- quality **
ex: how good was your last meal ? (poor, average, great)
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