chapter 1

Question 1

inferential?

Answer 1

infer, conclusion, prediction

Question 2

individuals?

Answer 2

people, animals, objects

Question 3

variable?

Answer 3

what is measured

Question 4

population?

Answer 4

EVERYONE. large number

Question 5

population parameter?

Answer 5

never changes

Question 6

sample?

Answer 6

smaller, easier to get dat

Question 7

sample statistic?

Answer 7

changes depending on sample

Question 8

Nominal?

Answer 8

name. qualitative. majors. names. color

Question 9

ordinal?

Answer 9

order. compare. ranking scalre (poor. average, good, excellent).

Question 10

interval?

Answer 10

subtract. time of day. temperature

Question 11

ratio?

Answer 11

divide. half twice, double, has a zero

length of time, price, income, test scores ,anthing you count, age

Question 12

sampling error?

Answer 12

difference in results because sample was used instead of entire population

Question 13

simple random sample?

Answer 13

number all members of population.

uses random number list to select members

Question 14

stratified?

Answer 14

divide population into groups.

draw random samples from each group

Question 15

cluster

Answer 15

divide population into groups.
draw random sample clusters
include EVERY member of selected cluster

Question 16

systematic

Answer 16

number sequentially. from randomly selected starting point.

include every 3rd member (2nd, 10th ect ect?

Question 17

convivence

Answer 17

select who is available

Question 18

confounded variable

Answer 18

effects of one may influence another variable

Question 19

observational study

Answer 19

doesn’t change the response or variable

Question 20

experiment

Answer 20

treatment imposed on individuals to observe a possible change.

Question 21

control group of experiment

Answer 21

dummy (pretend) treatment

Question 22

treatment group of experiment

Answer 22

real treatment

Question 23

placebo effect

Answer 23

subjects in control group incorrectly believe they are getting treatment and respond favorably

Question 24

bias

Answer 24

results don’t represent the true picture group

Question 25

census in gathering data

Answer 25

measure of entire population ALL

Question 26

sampling gathering data

Answer 26

choose part of population

Question 27

stimulation gathering data

Answer 27

dangerous or harmful to use technology to pretend