Simple Random Sample
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, a sample in which every possible sample of the same size has the same
chance of being selected.
"Assign a different number to each member of the population and use a
number table. Responses, counts or measures from members of the
population whose numbered correspond to those generated in the table
would be used in the sample."
Observational Study
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a researcher observes and measures characteristics of interest of part of a
population but does not change existing conditions.
"A study was performed in which researches observed and recorded the
mouthing behavior on nonfood objects of children up to three years old."
Systematic Sample
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a sample in which each member of the population is assigned a number.
"To collect a sample of the number of people who live in West Ridge
households, you could assign a different number to each household,
randomly choose starting number, select every 100th household, and count
the number of people living in each."
Ordinal
Give this one a try later!
, a sample in which every possible sample of the same size has the same
chance of being selected.
"Assign a different number to each member of the population and use a
number table. Responses, counts or measures from members of the
population whose numbered correspond to those generated in the table
would be used in the sample."
Observational Study
Give this one a try later!
a researcher observes and measures characteristics of interest of part of a
population but does not change existing conditions.
"A study was performed in which researches observed and recorded the
mouthing behavior on nonfood objects of children up to three years old."
Systematic Sample
Give this one a try later!
a sample in which each member of the population is assigned a number.
"To collect a sample of the number of people who live in West Ridge
households, you could assign a different number to each household,
randomly choose starting number, select every 100th household, and count
the number of people living in each."
Ordinal
