Free LSSGB Questions and Answers

Question 1

A rubber tire manufacturer is assessed based on five opportunities for each product; if 100 flaws are found out of 1000 goods produced in a month, the Rolled Throughput Yield is:

Accepted Answer

98%

Answer

Rolled Throughput Yield (RTY) is the probability that a process will produce a defect-free unit. To calculate the yield per opportunity: first, determine the Defects Per Opportunity (DPO). There are 100 flaws found in 1000 goods, with 5 opportunities per good, totaling 1000 * 5 = 5000 opportunities. DPO = 100 flaws / 5000 opportunities = 0.02. The yield per opportunity is then 1 - DPO = 1 - 0.02 = 0.98, or 98%.

Question 2

The Lean philosophy is what?

Accepted Answer

Provide perfect value to the customer through a perfect value creation process that has zero waste

Answer

The Lean philosophy is centered on providing perfect value to the customer through a perfect value creation process that has zero waste. It focuses on identifying and eliminating all forms of waste (Muda) in a process to maximize efficiency and deliver exactly what the customer needs, when they need it, with the highest possible quality. This continuous pursuit of perfection aims to create a seamless flow of value.

Question 3

What is claimed to be true when samples are randomly selected from a population?

Accepted Answer

The sampling distribution approaches normality with increase in sample size

Answer

When samples are randomly selected from a population, the Central Limit Theorem (CLT) states that the sampling distribution of the sample mean will approach a normal distribution as the sample size increases, regardless of the original population's distribution shape. This fundamental theorem is crucial for inferential statistics, allowing for the use of normal distribution properties to make inferences about population parameters.

Question 4

Which of these qualifies as a technique for gathering consumer information or feedback?

Accepted Answer

Focus Groups

Answer

Focus Groups qualify as a technique for gathering consumer information or feedback. They involve bringing together a small group of customers or stakeholders to discuss their perceptions, opinions, beliefs, and attitudes towards a product, service, concept, or idea. This qualitative research method allows for in-depth exploration and understanding of the 'Voice of the Customer' through interactive discussion.

Question 5

The formula for Sum Square of Error is:

Accepted Answer

Sum Squares due to Pure Error + Sum Squares due to Lack of Fit

Answer

In regression analysis and ANOVA, the Sum of Squares of Error (SSE) represents the variation in the dependent variable that is not explained by the model. This error can be further decomposed into two components: the Sum of Squares due to Pure Error (SSPE), which accounts for the variation within replicate observations, and the Sum of Squares due to Lack of Fit (SSLOF), which measures how well the model fits the data beyond the pure error. Therefore, SSE = SSPE + SSLOF.

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Certification Practice Test

Free LSSGB Questions and Answers