stats ch 7

since X is a ___ ___, its sampling distribution is simply the probability distribution derived from all possible samples of a given size from the population

random variable

___ is a subject population

sample

a ___ ___ ___ is a sample of n observations which has the same probability of being selected from the population as any other sample of n observations

simple random sample

a population parameter is a ___, even tho its value may be unknown

constant

a particular value of the estimator is called an ____

estimate

when a statistic is used to estimate a parameter, it is referred to as an ____.

estimator

if you sample repeatedly from a given population, the average value of the sample means will equal the population mean from the underlying population

expected value

examine the problem of estimating population parameters or testing hypothesis abt such parameters

inferential stats

___ consists of all items of interest in a statistical problem

population

we use a calculated ___ ____ to make inferences abt the unknown population parameter

sample statistic, simply statistic

___ ___ refers to a systematic exclusion of certain groups from consideration for a sample

selection bias

in ___ ___, the sample consists of elements from each group/. is preferred when the object is to increase precision

stratified sampling

in ___ ___, the sample consists of elements from selected groups. is preferred when the objective is to reduce costs

cluster sampling

for any population w expected value and standard deviation, the sampling distribution of X will be...

approximately normal if the sample size n is sufficiently large