Analyze phase

Question 1

What is the analyze phase about?

Answer 1

to determine the impact of the inputs to our process

Question 2

Tool applications in the analyze phase

Answer 2

Multi-Vari Chart, Inferential statistics, hypothesis test

Question 3

Name the 3 sources/causes of variation

Answer 3

Positional, cyclical, temporal

Question 4

Define positional

a. within subgroup
b. between subgroups
c. overtime

Answer 4

A within subgroup ( individual sample)

Question 5

Temporal

a. within subgroup
b. between subgroups
c. overtime

Answer 5

C overtime (time to time) or shift to shift. day to day, week to week

Question 6

Cyclical

a. within subgroup
b. between subgroups
c. overtime

Answer 6

B between subgroup ( between subgroups)

Question 7

Multi-Vari Chart is a analyze tool that displays patterns of ____

Answer 7

variation

Question 8

T/F

Multi-Vari chart is only used to identify Temporal variations

Answer 8

F

Used to identify X/ and families of variations of positional, temporal, and cyclical

Question 9

Multi-Vari Chart are used to analyze ____ of categorical/discrete inputs _____ output

Answer 9

Effects; Continuous

Example: effect on work shifts, impact of operators, setting, or material on Ys,
Effect of noise factors on Y’s

Question 10

Causes of non-normal distributions.... 
Skewness
Kurtosis
Multiple modes
Granularity

These dont give solutions but more of a ____ cause information

Answer 10

They give root cause information

Question 11

Why might Skewness occur? (left/ negative) (right/positive)

Answer 11

Natural limits, artificial limits/sorts, mixtures of data sets, nonlinear relationships, interaction of 2 inputs, nonrandom patterns across time (AGING, WEAR)

Question 12

Skewness for a normal distribution is 
A. 5
B. 7
C. 1.5
D. 0

Answer 12

D. 0

Question 13

how many types of kurtosis?

Answer 13

3:
Mesokurtic- 0
Platykurtic- negative
Leptookurtic- positive

Question 14

How many types of kurtosis?

Answer 14

3:
Mesokurtic- 0
Platykurtic- negative
Leptookurtic- positive

Question 15

Dot plot can show what data?

Answer 15

granularity

Question 16

_____ variance is the result of differences in the shape of the distribution with some special cause

Answer 16

Unequal

Question 17

what causes granularity?

• measurement system -resolution
• categorization data

Answer 17

level of detail in a set of data

Question 18

_____ variance is the result of differences in the shape of the distribution with some special cause
A. Equal
B. Unequal

Answer 18

Unequal

Question 19

used to make decision about how to adjust key process variables based on sample data not population data

Answer 19

Central Limit Therorem CLT

Question 20

standard deviation for the sampling distribution of means is called

Answer 20

standard error of the mean

Question 21

t/f

the error decreases when the sample size increases

Answer 21

True

Question 22

T/F

The error decreases when the sample size increases

Answer 22

True

Question 23

what is the goal of six sigma projects?

Answer 23

improve process capability to meet customer requirement by moving the process mean or reducing the standard deviation

Question 24

Helps us make fact based decisions ______ testing

Answer 24

Hypothesis

Question 25

purpose of hypothesis testing is to integrate the _____ with the Voice of the business

Answer 25

Voice of the process to make data based decisions to resolve problems, avoid high costs of experimental efforts by using existing data

Question 26

factors that influence decision making

Answer 26

past experience Current need Evidence Risk

Question 27

____ general statement, predetermined theory, or an assumption about the nature of or relationships between variables

Answer 27

hypothesis

Question 28

What is null hypothesis?

Answer 28

generally assumed to be true unless sufficient evidence is found to contradict Ho

Question 29

T/F | Alternate Hypothesis is when the the null hypothesis is considered true

Answer 29

FALSE. | considered true if the null hypo is false. Ha

Question 30

There are significant differences ____ & _____

Answer 30

practical & statistical

Question 31

_____ significance amount of difference, change, or improvement that will be practical, economic, or technical value to business

Answer 31

Practical significance

Question 32

____ significance is the magnitude of difference or change required to distinguish between a true difference, change, improvement.... one that could have occurred by chance

Answer 32

Statistical significance

Question 33

What order is correct for testing the hypothesis? 1. use test statistics, inverval, p-value 2. state the null & alternate 3. indentify consequences 4. establish sample size required 5. choose the hypothesis test 6. collect data and perform appropriate testing 7. choose population parameter

Answer 33

``` 7. 2. 5. 3. 4. 6. 1. ```