ICBB IASSC Lean Six Sigma – Black Belt Free Practice Exam Questions (2025 Updated)

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).

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 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.

It would be more likely than not for a Belt conducting a Regression Analysis to find that the _______________________.

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).

A Belt rearranged the location of the parts inventory for a rework station locating the most often used parts to be within hand reach of the repair person. This rearrangement resulted in quicker repair times by eliminating one of seven major elements of waste which is the Waste of __________.

Common and Special Cause ______________ are the focus of Statistical Process Control.

A ___________ is used primarily to track the stability of the average value of a metric of interest.

With Measurement System Analysis we are concerned with two issues that impact the potential variability of the data. They are _____________________.

A Non-parametric Test should be used if just one distribution is not Normal out of the two or more gathered.

A Personal Trainer was assessing her workout class participants for their body fat content and had to include data for her analysis. One of the columns listed the range of weight of the people included in the studies. This required plotting a Histogram of the weight of the people assessed for their body fat content. While drawing the Histogram the x-axis contained a certain scale of data. Pick the scale of data that is appropriate for Histograms.

Accuracy can be assessed in several ways and a fairly accurate means of measurement is visual comparison.

Production Line 1 is able to complete 500 units per shift. Production Line 2 is able to finish 1,500 units per shift. Production Line 2 is 3 times faster than Production Line 1. This analysis is an example of ______________ Scale Data.

The method of Steepest Ascent guides you toward a target inside the original inference space.

An example of the waste of mismanaged Inventory is __________.

What dollar amount of savings would a project show if it reduced your outstanding Accounts Receivable by $0.9 million dollars to $3.5 million total and your organization’s marginal cost of capital was 5.7%?

“A calculated time frame that matches customer demand” is a definition of what Lean Principles term?

When we compare short-term and long-term Capability which of these is true?

Questions that can be best answered by a Visual Factory include all of these except _____________________.