Which statement(s) are correct about the DOE Factorial plot output here? (Note: There are 3 correct answers).

The highest tool age was achieved with metal hardness at high level while keeping the cutting speed at the low level

The design indicated above is a 32 factorial design

All factors had 2 levels in the experiment

Two factors were operated at 3 levels each

The highest tool age was achieved with metal hardness at high level while keeping the cutting speed at the low level

The design indicated above is a 32 factorial design

The cutting speed and cutting angle are at the low level for the least tool age achieved

All factors had 2 levels in the experiment

Which statement is most correct for the Regression Analysis shown here?

The air-fuel ratio explains most of the TurbineOutput variation

The Regression explains 50.8% of the process variation

The air-fuel ratio explains most of the TurbineOutput variation

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

This Multiple Linear Regression has four statistically significant independent variables

For the data set shown here which of these statements is/are true?

Grade A has the lowest sample Mean of the 3 samples

Hypothesis Testing of Means or Medians cannot be done since there are an unequal number of observations for the 3 samples

A Paired T-test would be applicable for comparing Grade B and Grade A since they follow each other in the data set

Grade A has the lowest sample Mean of the 3 samples

Grade A has a higher sample Mean than Grade B

When a Belt properly analyzes the results of an experiment he must examine the Residuals in expectation of finding all of the following except _________.

Residuals will represent a Linear Regression

Some Residuals higher than others

Residuals will represent a Linear Regression

All Residuals within 2 Standard Deviations of the Mean

Some Residuals lower than others

A Belt working in a supply chain environment has to make a decision to change suppliers of critical raw materials for a new product upgrade. The purchasing manager is depending on the Belt's effort requiring that the average cost of an internal critical raw material component be less than or equal to $4,200 in order to stay within budget. Using a sample of 35 first article components, a Mean of the new product upgrade price of $4,060, and a Standard Deviation of $98 was estimated. The Alternative Hypothesis in the above example is?

The Mean is greater than $ 4,200

The Standard Deviation is equal to $300

The Mean is greater than $ 4,200

The Mann-Whitney test is a powerful test and is unique to situations from which of the choices listed? (Note: There are 2 correct answers).

Focuses on equality of the Median of the two populations

More widely applicable than the traditional ''t-test''

Testing the identity of two populations

Focuses on equality of the Median of the two populations

Less powerful than the traditional ''t-test''

More widely applicable than the traditional ''t-test''

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).

Process proportion equals some desired value

When we deal with Attribute type data

Process proportion equals some desired value

Process proportion equals some value range

When we deal with Attribute type data

Proportion of the tail is equal

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

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

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

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

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

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

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

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

If the results from a Hypothesis Test are located in the 'Region of Doubt' area, what can be concluded?

We fail to reject the Null Hypothesis

The test was conducted improperly

To be an effective Lean Six Sigma practitioner one must understand the difference between ___________________________.

Practical and Statistical significance

ANOVA and the Analysis of Variance

Nonparametric tests and tests of Non-normal Data

Practical and Statistical significance

F-test and test of variances of 2 samples

From the variance F-test shown above, which of these conclusions is/are valid?

The variance between the class score distribution is significantly different

The variance between the class score distribution is not significantly different

This test applies only to Normal Distributed data at 99 % confidence

The variance between the class score distribution is significantly different

There are not enough data points to make any statistical conclusions

For a batch manufacturing process, while assessing short term process variation, which variation category(ies) should one need to focus on? (Note: There are 2 correct answers).

Variation within consecutive pieces

Variation among consecutive batches

Variation within consecutive pieces

Variation among consecutive batches

Variation among groups of pieces

Variation among the completed product

From this list select the best example of Bias in Sampling.

Testing the weight of participants at a wrestling event and only measuring those who finished second or better

Testing the completeness of cooking a cake but the testers cannot agree on how to measure internal temperature

Testing the sharpness of a razor blade while the sample of 500 are from the same model razor

Testing the weight of participants at a wrestling event and only measuring those who finished second or better

Testing a hand-held GPS models for durability using samples only from Nokia Model P120

The Central Limit Theorem says that as the sample size becomes large the sample Mean distribution will form a Normal Distribution, ____________________.

No matter what the shape of the population distribution of individuals

If the Measurement System is properly calibrated

When the data is collected accurately

No matter what the shape of the population distribution of individuals

The class score distribution of schools in a metropolitan area is shown here along with an analysis output. Comment on the statistical significance between the Means of the two distributions. Select the most appropriate statement.

The two class Means are statistically different from each other

The two class Means statistically not different from each other

Inadequate information on class Means to make any statistical conclusions

A visual comparison shows that class Means are not statistically different

An operator is measuring the distance between two points. Which is most likely to be influenced by the operator?

All of these answers are correct

Six Sigma ICBB Practice Test 6 - Free Online Exam Prep & Questions

Fractional Factorial designs are used to reduce the time and cost of experiments because the ____________ has been lowered.

Number of data measurement points

Number of runs

People involved

Output summary

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Six Sigma ICBB Practice Test 6

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