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RES ECON 212 EXAM 1 Q&A 2024
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RES ECON 212 EXAM 1 Q&A 2024
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RES ECON 212 EXAM 1Levels of Measurement? - Answers -Nominal: categorical, no order, indicate quality
Ordinal: categorical, values indicate rank/order
Interval: numeric, intervals have meaning
Ratio: numeric, interval, true zero
Hair color, gender, favorite color, job classifications are examples of which level of
measurement? - Answers -Nominal
Temperature, and calendar year is an example of which level of measurement? -
Answers -Interval
How much money do you have in your wallet right now?
How many books are on the shelf?
How many years old are you? - Answers -All questions that can be Ratio; true zero
What is Systematic Random sampling? - Answers -1) Get a list of population items
2) Select a starting point between 1 and k
3) Select every Kth item on the population list
*K is determined as the ratio of the population size over the desired sample size
How are Simple Random Sampling and Systematic Random Different? - Answers -1)
systematic is easier to conduct
2) Systematic doesnt give every possible sample and equal chance
3) Systematic can be biased if there are periodic traits in the population
What is Stratified Sampling? - Answers -*More efficient* The population is divided into
subgroups called STRATA so that each item belongs to only one homegenous strata.
Strat is formed with similar characterisitcs
Cluster Sampling? - Answers -*cheaper* Divide the population into groups or clusters
a random sample of "m" clusters is selected
Define Data Set: - Answers -A collection of all the values of all of the variables, for all of
the observations we have chosen
Descriptive VS Inferential? - Answers -Descriptive: numbers used to summarize and
describe data
Inferential: based on the assumption that sampling is RANDOM
Define Census? - Answers -Measurements from everu i
In general, grouped frequencies should have between 5 and 20 class intervals? T or F?
- Answers -True
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