WorksheetsGreen Belt Week 2, Day 2 Review
Total questions: 22
Worksheet time: 11mins
Central Tendency... Which answer best describes an Arithmetic average of a set of values, strongly influenced by extreme values
Median
Mode
Mean
Middle
Central Tendency... Reflects the 50% rank - the center number after a set of numbers has been sorted from low to high, robust to extreme values.
Median
Mode
Mean
Middle
Central Tendency... Which answer reflects the most frequently occurring value.
Median
Mode
Mean
Middle
Measures of Dispersion... Which answer reflects the distance between the extreme set of values of a data set (Highest - Lowest)
Distance
Standard Deviation
Variance
Range
Measures of Dispersion... Which answer reflects the Average Squared Deviation of each data point from the Mean?
Distance
Standard Deviation
Variance
Range
Measures of Dispersion... Which answer reflects the Square root of the variance?
Distance
Standard Deviation
Variance
Range
What sigma level can you find 99.73% of the defects represented on a +/- distribution?
1 sigma
2 sigma
3 sigma
4 sigma
Using Excel, which "Data Analysis" tool would aid us in determining the Mean, Median,Mode, Variance and Confidence level of a data set?
Histogram
Descriptive Statistics
Regression
2-sample T-test
Using Excel, which "Data Analysis" tool would aid us in visualizing the Normality or distribution of a data set?
Histogram
Descriptive Statistics
Regression
2-sample T-test
When collecting data why should we include categorical information?
Google best practice
To help us with our SIPOC
To be able to subgroup data
Necessary in healthcare
Using the image, what is the categorical value used in this graph?
Call time by Office location
Call time by Rep
Call time average
Call time variation
If you didn't calculate the sample size for a data set, what is an acceptable sample size to use?
30 or more for any data type
10, 20, 30
4,40 or 400
What happens to the 95% confidence interval when the sample size is small, say 4 data points?
It increases in size
Decreases in size
Stays the same
Depends on your attitude
Comparisons:
In statistics when we want to see if we made a shift change in performance on a given data set, what Hypothesis test would we probably use between 2 data values (Pre/Post change).
ANOVA
2-sample T-Test
Covariance test
F-test
Comparisons:
Typically what is the Null hypothesis on a 2 sample comparison.
There is no statistical signifigance between the data sets
There is a difference between the data sets
Alpha/Beta
A value is greater
Comparisons:
What is the standard or typically the default alpha risk for hypothesis testing? The p-value.
10% or .10
95% or .95
5% or .05
50% or .50
What is another name for a cause and effect diagram?
Albatross
Survey
Statistical Value Analysis
Fishbone
What kind of tool is the following?
Fishbone
Ishikawa Diagram
Cause and Effect Matrix
RAIL
What is the purpose of a C&E diagram?
To use as a qualitative tool to quantify the influence that process steps or inputs have upon process outputs, and helps us focus our efforts on the inputs or process steps that have the most influence on the most important customer requirements
One of the Green Belt tools we have to use for all projects
To test our capabilities in Excel
What is the purpose of a Failure Mode & Effect Analysis (FMEA)?
To make sure we don't fail on the improvements we make on our projects.
One of the Green Belt tools we have to use for all projects
Looks at the process from the failure perspective & the influence of the process inputs into 3 measures to quantity the Risk Priority Number (RPN)
What are the 3 elements the RPN number comprised of on an FMEA?
Social Influence, Observations, Development
Save, Our, Data
Simple, Occurrence, Decision
Severity, Occurrence, Detectability
Is it important to work with a team to determine the ranking scales for S,O,D ?
Yes, we need to be in agreement on the levels and create a legend we can follow when we score the inputs.
No, you just need to follow the standard one for health care for all situations.
Yes, since we are a team, we should agree on what I think they should be.
No, takes to long to get consensus and ultimately little or no value
