Needed Review Areas Flashcards

1
Q

R-squared

A

range from 0 to 1

CLOSE To ZERO - data not aligned (r-squared is HIGH).. graph spread out

CLOSE TO 1 - error is SMALL, data close alignment to regression line

one of each variable I and D = correlation coefficient

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2
Q

Time-Series

A

Time is INDEPENDENT variable to assess influence may have on output

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3
Q

More then ONE independent variable

A

multiple regression

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4
Q

5 Data PATTERNS

A
Trend
Cyclicality
Seasonality
Irregularity 
Random Variation
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5
Q

General slope Upward or Downward over a LONG period of time

A

Trend

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6
Q

Repetition of up (peaks) or down movements (troughs) that follow or counteract a business cycle that can last several years.

A

Cyclicality

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7
Q

Regular pattern of volatility, usually within a single year.

A

Seasonality

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8
Q

ONE-TIME deviation from unforeseen circumstances (war, pandemic, etc)

A

Irregularity

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9
Q

variability of a process which might be caused by irregular fluctuations due to chance that cannot be anticipated,
detected, or eliminated.

A

random variation

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10
Q

can be applied when the dependent variable is a categorical, binary variable, such as male/female,
dead/living, gas/electric, etc

A

logistic regression

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11
Q

occurs when a given data point on a time series analysis is affected by a previous data point for that time
series

A

autocorrelation
(durbin watson statistic)

check for this when under Time Series

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12
Q

occurs when all of the random variables have the same general finite variance..
data
points in a scatterplot stay approximately the same distance away from the regression line throughout the entire dataset.

A

Homerscedasticity

OLS regression (ordinary least squares)

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13
Q

Useful in Marketing, Medicine, Soc Media, Education

A

Cluster Analysis

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14
Q

is designed to establish a logical
sequence for decisions, to consider the decision alternatives available, and to evaluate the results they will produce… limted # potential outcomes possible

A

Decision Tree

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15
Q

Focus on customers

A

Lean processes - eliminate anything not adding value to customers

PDCA Cycle - work with customer to create best possible product

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16
Q

Tools for Strong Leadership

A

Tree Diagrams

Process Decision Program Charts

17
Q

Focus on the process.. useful when focus on the process of managing resources

A

SIPOC - Supplier Input Process Output Customer

18
Q

Continuous improvement

A

PDCA - to create best possible process or product

ISO Certification

19
Q

can useful making fact-based decisions when looking at quality because it measures the
performance and determines areas that need improvement.

20
Q

four-step method for testing hypotheses and solving

problems. The cycle is based on the scientific method

A

PDCA
Plan - identify prob, develop plan

Do - run Experiment to see if plans will work on small scale

Check - analyze results; can be improved?

Act - enact change on larger scale; part of normal operations

21
Q

uses OBSERVED data to determine the changes that have to be made to a process or procedure

A

Quality CONTROL

22
Q

uses PROJECTED data to make the best possible model or procedure before that model or procedure is applied
rEFINE PROCESSES

A

quality ASSURANCE

23
Q

Uncover defects; Assess performance and recommend corrective action; recognize prob so can fix; Inspection and Repair; REACTIVE

A

Quality Control

24
Q

PREVENT defects from occuring; assess Capability; understand intricacies of system and predict outcomes; PROACTIVE

A

quality ASSURANCE

25
allows you to see all of the elements that could influence the process before work is begun. It helps you define the boundaries of your operations by providing a high-level view of the complete process, from supplier to customer
SIPOC Diagram
26
combines the streamlining and waste-elimination concepts of Lean practices with the variation- and quality-control ideas of Six Sigma.
Lean Six Sigma
27
Lean Systems (problem-solving, delivering value, free up resources)
work continuously to eliminate the defects and rework in their systems Value-added work is enhanced and non-value-added work is minimized Inventory is minimized and delivered just-in-time
28
a highly disciplined, data-driven approach for improving quality... focuses intently on facts and statistics
six sigma
29
places six standard deviations between the mean (or average) value for quality outputs and allowed limits on a histogram used to measure results
six sigma
30
USES 5 step Framework (DMAIC)
six sigma