Stats test 1

Parameter

The whole population; all the students in a classroom

Statistic

A group from the population; asking a question to a couple people in the grocery store as they leave

Nominal

data is only names, categories, labels, etc. (things that cannot be arranged or measured) (LOWEST LEVEL)

ex: black, red, blue, pink

Ordinal

data can be arranged but there are no differences between data values; no subtracting (SECOND LOWEST LEVEL)

ex: poor, okay, great

Interval

data can be arranged and have differences but there is no set starting time (SECOND HIGHEST LEVEL)

ex: 350*, 400*, 450* (oven temps)

Ratio

data can be arranged in order, there are differences, there is a starting point, values are meaningful (HIGHEST LEVEL)

ex: 1st place, 2nd place, 3rd place

Discrete

distinct countable whole numbers

ex: cars in a parking lot, results of a dice rolled

Continuous

numbers that are measurable and can include fractions or decimals

ex: persons weight, time taken to run a mile

Random Sampling

every member of a population has an equal chance at being selected

Systematic Sampling

starting point is chosen then a select number after that is selected

ex: every 3rd person in the line is selected

Convenience Sampling

using data/results that is readily available

ex: waiting by a room and everyone who walks by between 12:00-1:00 is selected

Stratified Sampling

diving the population into 2+ groups and selecting some from each group

ex: Group 1: 1, 2, 3, 4, 5, 6 ; Group 2: A, B, C, D, E, F

Cluster Sampling

dividing the population into 2+ groups and selecting some from one group and none from the others

ex: Group 1: 1, 2, 3, 4, 5, 6 ; Group 2: A, B, C, D, E, F