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statistics > chapter 1 > Flashcards

chapter 1 Flashcards

1
Q

inferential?

A

infer, conclusion, prediction

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2
Q

individuals?

A

people, animals, objects

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3
Q

variable?

A

what is measured

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4
Q

population?

A

EVERYONE. large number

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5
Q

population parameter?

A

never changes

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6
Q

sample?

A

smaller, easier to get dat

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7
Q

sample statistic?

A

changes depending on sample

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8
Q

Nominal?

A

name. qualitative. majors. names. color

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9
Q

ordinal?

A

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

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10
Q

interval?

A

subtract. time of day. temperature

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11
Q

ratio?

A

divide. half twice, double, has a zero

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

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12
Q

sampling error?

A

difference in results because sample was used instead of entire population

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13
Q

simple random sample?

A

number all members of population.

uses random number list to select members

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14
Q

stratified?

A

divide population into groups.

draw random samples from each group

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15
Q

cluster

A

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

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16
Q

systematic

A

number sequentially. from randomly selected starting point.

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

17
Q

convivence

A

select who is available

18
Q

confounded variable

A

effects of one may influence another variable

19
Q

observational study

A

doesn’t change the response or variable

20
Q

experiment

A

treatment imposed on individuals to observe a possible change.

21
Q

control group of experiment

A

dummy (pretend) treatment

22
Q

treatment group of experiment

A

real treatment

23
Q

placebo effect

A

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

24
Q

bias

A

results don’t represent the true picture group

25
Q

census in gathering data

A

measure of entire population ALL

26
Q

sampling gathering data

A

choose part of population

27
Q

stimulation gathering data

A

dangerous or harmful to use technology to pretend

statistics (1 decks)

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