Stats Vocab

.. is when the effects of one cannot be distingushed from the effects of the other

divide the entire population into pre-existing segments or clusters

..is a use of variety of sampling mathods to create successivlely smaller groups.

measurements or observations from part pf the population are used

people or objects incuded in the study

used to assign individuals to the two treatment groups, helps prevent bias for each group

observations of individuals are conducted so it does not change the variable being measured

the data that consists of names, labels, or categories

individuls sorted into blocks, then a random process used to assign each member to a treatment

a random processis used to assign each individual to one of the treatments

a list of individuals from which a sample is selected

can be ordered, by differences and ratios that are meaningful, including the value of zero

group of individuals sharing some common features that might affect the treatment

characters of the individual to be measured or observed

for which no data has been collected but nevertheless has influence on other variables involved

a numerical facsimilie or representative for a real-world phenomenon

divide poulation into subgroups based of specific characteristics such as age, income, etc.

... is the difference between measurements from a sample and from the population

a subject recieves no treatment but (incorrectly) believes they are receiving correct treatment

this group is recieved a "dummy treatment" enabling reaserchers a control for placebo effect

measurements from a population group selected in which each sample has a chance to me picked

involves methos of using info from a sample to draw conclusions reguarding the population

data can be ordered, the differences of data values are meaningless

poor sample design, sloppy data collection, faulty measuring instruments, bias questions

a treatment to observe a possible change in the response or variable being measured

Satistic is...

Quantitative Variable

reduces possibility of the differences in pain relief for the 2 groups occurred by chance alone

... is collecting, organizing, analizing, and interpreting data.

Convenience Sampling

use a simple random sample from the entire population

the data from only some of the individuals of interest

involves mehods of organizing, picturing, and summarizing info from samples the population

measurements or observations from the entire population are used

number each member of a population; from a starting point every n^th number is chosen at random

the variable describes and individual through grouping or categorization

Undercoverage is..

data can be ordered and the differences of data values are meaningful

the data is from every individual of interest

.. is a numerical measure that describes an aspect of a population