stat ch 1
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study of methods to describe and measure aspects of nature sample is
statistics

process of inferring an unknown quantity of a target population using sample data is knonw as?
estimation

quantity describing a population is known as ?
parameter

related quantity calculated from a sample is knonw as?
statistic or estimate

Population is?
all individual units of interest

Sample is?
subset of units taken from the population

difference between an estimate and population parameter being estimated caused by chance is?
sampling error

if values we obtained are tightly grouped and highly repeatable, they are said to be ?
precise

In random sample..?
each member of a population has an equal and independent chance of being selected.

what minimizes bias and makes it possible to measure the amount of sampling error?
random sampling

A sample of convenience is?
a collection of individuals that are easily available to the researcher

Variable is?
characteristics that differ among individuals

name types of variables?
 Categorical
 numerical
 explanatory
 response.

Categorical variable describes?
Qualitative characteristics of individuals that do not correspond to degree of difference on a numerical scale.

Numerical data ( variable is) ?
quantitative measurements that have magnitude on a numerical scale.

frequency distribution is?
describes the number of times each variable accrues in the sample.