Six Sigma LSSGB 問題練習

Question No : 1
Measurement System Analysis is a procedure used to quantify all ____________ in the method or system used for taking measurements.

• A.Totals
• B.People involved
• C.Variation
• D.Summations

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Question No : 2
Skewed, or Mixed, Distributions occur when data comes from several sources that are supposed to be the same yet are not.

• A.True
• B.False

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Question No : 3
The ____________ is important because it provides an estimate of the probability of an event occurring depending on the Standard Deviation from the Mean.

• A.Shewhart Principle
• B.Pareto Rule
• C.Mean/Mode Spread
• D.Empirical Rule

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Question No : 4
If the data displayed in a Histogram displays two peaks the distribution would likely be _____________.

• A.Transformed
• B.Multi-skewed
• C.Bi-attribute
• D.Bimodal

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Question No : 5
For the data shown here a Belt suspects the three grades are supplying the same results.



Which statement(s) are true for proper Hypothesis Testing?

• A.The most appropriate Central Tendency to test is the Means
• B.An appropriate test to test Central Tendency is the Levene’s test
• C.An appropriate test to test Central Tendency is the ANOVA test
• D.An appropriate test to test Central Tendency is the Mood’s Median test

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Question No : 6
Contingency Tables are used to perform which of these functions?

• A.Illustrate one-tail proportions
• B.Analyze the "what if" scenario
• C.Contrast the Outliers under the tail
• D.Compare more than two sample proportions with each other

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Question No : 7
The Mann-Whitney Test is used to test if the Means for two samples are different.

• A.True
• B.False

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Question No : 8
Non-parametric testing is done when which of these are applicable? (Note: There are 3 correct answers).

• A.When the traditional t tests don’t produce the results we need
• B.A Hypothesis Test for the Median of the population is in question
• C.It does not require data to come from Normally Distributed populations
• D.They look at the Median rather than the Mean of populations
• E.When there are no parameters to measure in the process

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Question No : 9
Which of the following is used to test the significance for the analysis of a Variance Table?

• A.t Test
• B.F Test
• C.Chi Square Test
• D.Acid Test

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Question No : 10
According to a manager it takes an average weekday commute of 39 minutes with a Standard Deviation of 7 minutes for the employees to get to work while they use their personal vehicles for their office commute while the management set a policy of not more than 40 minutes for their daily one-way commute. A survey conducted one day on 70 employees showed an average of 34 minutes commuting time using the metro public transportation system with a Standard Deviation of 21 minutes.
If the Standard Deviation is uncontrollable then the other option to increase the probability of coming in on time via personal vehicles to work could be ____________?

• A.Increase the average time of commute
• B.Maintain the average time of commute and change route to work
• C.Reduce average commute time to work by departing earlier
• D.Change policy at work and request for flexible times based on location

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Question No : 11
According to a manager it takes an average weekday commute of 39 minutes with a Standard Deviation of 7 minutes for the employees to get to work when they use their personal vehicles for their office commute while management set a policy of not more than 40 minutes for their daily one-way commute. A survey conducted one day on 70 employees showed an average of 34 minutes commuting time using the metro public transportation system with a Standard Deviation of 21 minutes.
For the employees choosing to increase their chances to come on time using personal transportation their variation should be reduced to ___________?

• A.1 minute
• B.6 minutes
• C.3.5 minutes
• D.Eliminate it to 0.0 minutes

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Question No : 12
Due to excessive pollution, GREEN Solutions Inc. is considering subsidizing public transportation to work for its employees. According to the manager it takes an average weekday commute of 39 minutes with a Standard Deviation of 7 minutes for the employees to get to work while they use their personal vehicles for their office commute while the management set a policy of not more than 40 minutes for their daily one-way commute. A survey conducted one day on 70 employees showed an average of 34 minutes commuting time using the metro public transportation system with a Standard Deviation of 21 minutes.
Assuming a Normal Distribution for the commute times by either personal or public transportation, which of these is true?

• A.The probability that they would arrive on time using personal vehicles is much higher than using the metro public transportation system (MPTS)
• B.The probability that they would arrive on time using the MPTS is much higher than using their personal vehicles
• C.The two probabilities are about the same excepting in one case the consistency is higher than the other
• D.We need to compile more data around weekends to incorporate for traffic differences
• E.When Standard Deviation is higher the probability goes down and so the MPTS is worse

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Question No : 13
The Standard Deviation for the distribution of Means is called the ___________ and approaches zero as the sample size reaches 30.

• A.Standard Error
• B.Mean Deviation
• C.Mean Spread
• D.Mean Error

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Question No : 14
When a Belt is analyzing sample data she should keep in mind that 95% of Normally Distributed data is within +/- 2 Standard Deviations from the Mean.

• A.True
• B.False

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Question No : 15
A 1-Sample t-test is used when you want to compare the Median of one distribution to a target value.

• A.True
• B.False

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