Statistics Chapters 1&2

Question 1

is the class frequency divided by the total # of observations in the data set

Accepted Answer

Class Relative Frequency

Question 2

Is an Object (person, thing, event/transaction) upon which we collect data

Accepted Answer

Experiment (Observational) Unit

Question 3

Utilizes sample data to make estimates, decisions, predictions, etc about a larger data set

Accepted Answer

Inferential statistics

Question 4

Useful when questions by pollsters are likely to elicit false answers

Accepted Answer

Randomized Response Sampling

Question 5

Experimental Unit sampled in their natural setting. No attempt is made to control the units

Accepted Answer

Observational Study (example: Opinion Polls/Surveys)

Question 6

est. or predict. or some other generalization about a populations based on info in a sample

Accepted Answer

Statistical Inference

Question 7

Exhibits Characteristics typical of those possessed by the population of interest

Accepted Answer

Representative Sample

Question 8

Sample of natural groupings compared to similar groupings

Accepted Answer

Cluster Sampling

Question 9

Is comprised of Five elements

Accepted Answer

Elements of Inferential Statistics

Question 10

A subset of the units of a population

Accepted Answer

Sample

Question 11

Is comprised of four elements

Accepted Answer

Descriptive Statistics

Question 12

the tendency of data to cluster, or center, about certain numerical values

Accepted Answer

central tendency

Question 13

When the response data differ from the potential data of non responders

Accepted Answer

Selection Bias

Question 14

Involves applying rational thought and science of stats to critically asses data and inferences

Accepted Answer

Statistical Thinking

Question 15

Process whose operations are unknown or unspecified

Accepted Answer

Black Box

Question 16

Is a set of units (people, objects, transactions, or events) that we are interested in studying

Accepted Answer

population

Question 17

refers to the methodologies that extract useful information from data to make biz. decisions

Accepted Answer

Business analytics

Question 18

the categories (classes) of qualitative variable are represented by bars

Accepted Answer

Bar Graph

Question 19

is the class frequency divided by the total number of observations in the data set

Accepted Answer

Class Relative Frequency

Question 20

Systematically select every Kth experimental unit from a list of all experimental units

Accepted Answer

Systematic Sample

Question 21

one of the categories into which qualitative data is assigned

Accepted Answer

Class

Question 22

the __ of a qual. data set is the mid # when the measurements are arranged in decending order

Accepted Answer

Median

Question 23

Any set of output (object or #'s) produced by a process

Accepted Answer

sample

Question 24

When the Response Data differ from the potential data of non responders

Accepted Answer

Non Response Bias

Question 25

Utilizes # and Graphs to: explore data & patterns, summarize info, and present in convnt. form

Accepted Answer

Descriptive Statistics

Question 26

The Class relative frequency multiplied by 100

Accepted Answer

Class Percentage

Question 27

ƞ = a sample selected from the pop. in such a way that every different sample of Ƞ is equal

Accepted Answer

Simple Random Sample

Question 28

inaccuracies in the values of the data collected. in surveys, error may be due to leading q's

Accepted Answer

Measurement Error

Question 29

Used when the Exp. unit assoc. w/ the pop. can be separated into two or more units or strata

Accepted Answer

Stratified Random Sampling

Question 30

a measurement that does not occur on a natural # scale; can only be classified into a group

Accepted Answer

Qualitative Data

Question 31

___ is a Measurement that is recorded on a naturally occurring numerical scale.

Accepted Answer

Quantitative Data

Question 32

a Bar graph with the classes of the qualt. variables arranged by height in descending order

Accepted Answer

Pareto Diagram

Question 33

sum of the measurements of a set of quant. data divided by the # of meas. in the data set

Accepted Answer

mean

Question 34

Data collection method where the researcher has full control over the characteristics of units

Accepted Answer

Designed Experiment (treatment vs control group)

Question 35

symbol for.....

Accepted Answer

Population Mean

Question 36

the spread of the set of measurements

Accepted Answer

variablility

Question 37

A characteristic or property of an individual experimental (or observational) unit

Accepted Answer

Variable

Question 38

The number of observations in the data set falling into a particular class

Accepted Answer

Class Frequency

Question 39

Symbol for.......

Accepted Answer

Population Mean

Statistics Chapters 1&2

Questions 39

Statistics Chapters 1&2

Questions 39