Chapter 12 Sample surveys

Question 1

Population

Answer 1

The entire group of individuals or instances of who we hope to learn

Question 2

Sample

Answer 2

A representative subset of a population examined in hope of learning about that population

Question 3

Sample survey

Answer 3

Polls designed to ask questions of small group of people in the hope of learning something about the entire population

Question 4

Biased

Answer 4

Sample methods that tend to over or underemphasize some characterize of the population

Question 5

Randomizing

Answer 5

Ensures that on average the sample looks like the rest of the population

Question 6

What is most important when doing a sample

Answer 6

The “NUMBER” OF INDIVIDUALS IN THE SAMPLE is more important than size population

Question 7

Census

Answer 7

A sample that include all individuals of the entire population

Question 8

Models

Answer 8

Use mathematics to represent reality

Question 9

Parameters

Answer 9

. Are key numbers in a models

.

Question 10

Population parameter

Answer 10

A parameter used in a model for a population

Question 11

Statistics

Answer 11

Any summary found from data ( aka sample statistics )

Question 12

Representative

Answer 12

A sample that is said to be representative if the statistics computed from it accurately reflect the corresponding population parameters

Question 13

Simple random Sample

Answer 13

in which each COMBINATION( set of n elements) in the population has an equal chance of selection

Question 14

Sample Frame

Answer 14

Is a list of individuals from which the sample is drawn