chapter 2 Key terms

Question 1

observation

Answer 1

a piece of information we gather using our senses

Question 2

hypothesis

Answer 2

a educated guess

Question 3

prediction

Answer 3

a logical statement about what will happen if the hypothesis is supported

Question 4

experiment

Answer 4

a procedure designed to test a hypothesis

Question 5

variable

Answer 5

a factor of interest

Question 6

experimental group

Answer 6

the group that receives experimental treatment

Question 7

control group

Answer 7

the group that does not receive experimental treatment

Question 8

data

Answer 8

information that scientist gather

Question 9

correlations

Answer 9

associations between two or more events

Question 10

statistics

Answer 10

the collection and classification of data that is a form of numbers

Question 11

mean

Answer 11

the number obtained by adding the data for characteristics and diving this sum by the number

Question 12

distribution

Answer 12

the relative arrangement of members of a statistical population

Question 13

probability

Answer 13

the chance that something will happen

Question 14

sample

Answer 14

a group of individuals or events selected to represent the population

Question 15

risk

Answer 15

the probability of a unwanted outcome

Question 16

models

Answer 16

representations of objects or systems

Question 17

conceptual model

Answer 17

a verbal or graphical explanation of how a system works or is organized

Question 18

mathematical model

Answer 18

one or more equations that represent the way a system or process works

Question 19

values

Answer 19

standards or information we consider important

Question 20

decision making model

Answer 20

is a conceptual model that provides a systematic process for making decisions