PUT THE FOLLOWING TEST SCORES IN ORDER AND GROUP THEM INTO FOUR GROUPS; 80 95 78 98 84 99 82 92Question of day

AGENDA

Finish test

Notes on samples

Write your own notes

Exit ticket

VALID SAMPLENotes on sample and populations

BOTH ARE POOR SAMPLING METHODS

Voluntary response- sampling occurs when people choose to respond

People that volunteer response have strong opinions, often negative, that may not represent population well

Convenience sampling- choosing sample by location or convenient

Often not representative of population

Bias- occurs when poor sampling methods are used

The result of the sampling systematically favors certain outcomes

VALID SAMPLE

Representatives of the entire population

Large enough, but not to time consuming

Does not exclude any group

Equal opportunity for all opinions

SURVEY

Method of collecting data

DATA

Pieces of Information, Numbers and facts

YOU WRITE THESE IN

Population

Census

Parameter

Statistic

Sample

Sample space

EXIT TICKET

Give example of biased survey