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Which test is used for testing significance in ANOVA? Assuming normally distributed data with equal variances.
A) Levene's Test
B) Means Test
Find the answer at ANOVA
Which two types of charts are most sensitive in detecting minor but gradual shifts in a process?
The keyword is "most". Find the answer at EWMA
Calculate the sample size required for a discrete (binomial) proportion estimation with an unknown population. Given
z = 1.645 for a confidence level (α) of 90%.
p-bar = 0.5
E = 2% = 0.02
Therefore, solving for the sample size
n = 1.6452 * 0.5 * (1 - 0.5) / 0.022
n = 0.6765062 / 0.0004 = 1691.27 (always round up)
n = 1692. A minimum of 1,692 samples are needed.
If you wanted a confidence level of 95%, the z-score is 1.96 and n becomes 2,401 samples.
Click here to learn more about calculating sample sizes for various types of data.
A common use of the student t-test is to detect a difference (or not) in
3) Degrees of Freedom
Answer: Visit T-Test Module for the answer and more insight
To further test your Lean Six Sigma knowledge and prepare for your certification exam, you will find 180+ questions by clicking here.
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A goal of the Six Sigma project manager, in the MEASURE phase, is to recognize potential bias in the data (or responses) and prevent it from coming into play if possible. Forms of bias that can be introduced into the sampling strategy are:
Six Sigma Slides
Green Belt Program (1,000+ Slides)
Cost of Quality
Cause & Effect Matrix
Central Limit Theorem
MTBF and MTTR
... and more