G11 1S FT STATS: Sampling Distribution of Sample Means (Terminologies)

survey

an instrument used to gather information

population

totality, all elements, whole universe

sample

portion/subset of the population

sampling

the process of sellecting a portion of the population

statistic

these are the descriptive measures computed from a sample

parameter

these are descriptive measures computed from a population

random

when the outcome is by chance

sampling error

- this is the error resulting from using a sample to estimste a population characteristic.

- It is the difference between the sample measure and the corresponding population measure

sampling distribution of sample means

a frequency distribution using the means computed from all possible random samples of a specific size taken from a population.

n

the symbol for sample size

N

the symbol for population

- Probability sampling

- Non-probability sampling

2 Types of Sampling Methods

Probability sampling

a random selection allowing strong statistical inference about the whole group

Non-probability sampling

a random selection based on convenience