CSSBB sample questions

Question 1

Assessing process proportion as opposed to evaluating a process with respect to a set target can be done using one or more of these. (Note: There are 2 correct answers).

Accepted Answer

Process proportion equals some desired value

Accepted Answer

When we deal with Attribute type data

Answer

Process proportion equals some value range

Answer

Target is current

Answer

Proportion of the tail is equal

Question 2

The _____________ Distribution would be the most desirable for modeling the number of stitch defects in a portion of fabric.

Accepted Answer

Poisson

Answer

Exponential

Answer

Extended

Answer

Weibull

Question 3

Which statement(s) are most correct for the Regression Analysis shown here?

Accepted Answer

The air-fuel ratio explains most of the TurbineOutput variation

Answer

The Regression explains 50.8% of the process variation

Answer

This Simple Linear Regression explains 98+% of the process variation

Answer

This Multiple Linear Regression has four statistically significant independent variables

Question 4

When a Belt Poka-Yoke’s a defect out of the process entirely then she should track the activity with a robust SPC system on the characteristic of interest in the defect as an early warning system.

Accepted Answer

False

Answer

True

Question 5

A valid mathematical Regression represents all of the characteristics shown except __________________.

Accepted Answer

All of the standardized residuals will be within ±3 Standard Deviations

Answer

The residuals when plotted follow a Normal Distribution

Answer

The sum of the residuals is zero

Answer

Most standardized residuals are within ±2 Standard Deviations

Question 6

If in an experiment all possible variable pairs sum to zero the design is Orthogonal.

Accepted Answer

True

Answer

False

Question 7

A valid Multiple Linear Regression (MLR) is characterized by all of these except?

Accepted Answer

MLR is conducted based on a deliberate form of experimentation

Answer

It is an assumption that the X’s (inputs) are not correlated to each other

Answer

The X’s (inputs) are assumed to be independent of each other

Answer

The Residuals from MLR analysis have to be Normally Distributed

Answer

It is not possible to evaluate interactions in a MLR analysis

Question 8

For the data shown here which statement(s) are true? (Note: There are 2 correct answers).

Accepted Answer

With greater than 95% confidence, we conclude the samples are from Non-normal Distributions

Accepted Answer

If we wanted to compare the Central Tendencies of these three samples we could use Mood’s Median test

Answer

With 95% confidence, we cannot conclude if the samples are from three Normal Distributions

Answer

If we wanted to compare the Central Tendencies of these three samples we would use the one way ANOVA test

Answer

If we wanted to compare the Central Tendencies of all three samples we could use the Mann-Whitney test

Question 9

SPC Charts are used extensively in different business and decision-making environments. In this example a vendor is being selected based on speed of delivery. Which of the conclusions would help you pick a vendor for your needs regarding lead-time of delivery from your vendors? (Note: There are 4 correct answers).

Accepted Answer

Vendor B as it has a better consistency (lower variance) on lead time

Accepted Answer

Vendor B as Vendor A shows a situation out of control as shown in red

Accepted Answer

Vendor B as the Control Limits are much narrower than Vendor A

Accepted Answer

Vendor B with higher lead time, but a process with much narrower Control Limits

Answer

Vendor A with a much shorter lead time in delivery

Question 10

For the data shown here which statement(s) are true? (Note: There are 2 correct answers).

Accepted Answer

With greater than 95% confidence, we conclude the samples are from Non-normal Distributions.

Accepted Answer

If we wanted to compare the Central Tendencies of these three samples we could use Mood’s Median test.

Answer

With 95% confidence, we cannot conclude if the samples are from three Normal Distributions.

Answer

If we wanted to compare the Central Tendencies of these three samples we would use the one way ANOVA test.

CSSBB Sample Questions & Answers

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CSSBB Sample Questions & Answers

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