EPPS 6313.001 - Week 1 & 2
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Characteristic of an item or individual
Individual values associated with variable.
Type of Variable
Variables have values that can only be put into categories, such as “yes” and “no.”
Types of Variables
Variables have values that represent a counted or measured quantity.
Result from a counting process.
Result from measuring process
Levels of Measurment
Classifies data into distinct categories in which no ranking is implied.
Levels of Measurement
Classifies data into distinct categories in which ranking is indeed implied
is an ordered scale in which difference between measurements is a meaningful quantity... but the measurements do not have a true zero point.
is an ordered scale in which the difference between the measurements is a meaningful quantity and the measurements do have a true zero point.
consists of all items or individuals about which we want to draw a conclusion… population is the “big group”
is the portion of a population selected for analysis…. sample is the “small group”
Items included are chosen without regard to their probability of occurrence.
items are selected based only on the fact that they are easy, inexpensive or convenient to sample.
get opinions of pre-selected experts in the subject matter
items in sample are chosen on the basis of known probabilities.
Simple Random Sample
every individual or item from the frame has an equal chance of being selected
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