Monthly Archives: August 2010

How to proceed Analyze phase ? Hypothesis Testing – Part 9 ( 1-proportion test )

In the previous blogs Hypothesis Testing ( Part 1 – 8 ), the statistical tools covered were related to “mean(m)” and “Variance(σ/σ2)”. In this blog onward, “Proportion(p)” will be discussed. Basically, proportion data is derived from the ratio of binary … Continue reading

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How to proceed Analyze phase ? Hypothesis Testing – part 8 ( Test for Equal Variances )

In this blog, it’s continued on discussing variances test for multiple samples ( > 2 samples ). It’s called as Test for Equal Variances in Minitab. If the multiple sample data distributions do not follow Normal distribution, Levene’s test should … Continue reading

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How to proceed Analyze phase ? Hypothesis Testing – Part 7 ( 2 Variances Test )

In previous blog, Single Variance Test was discussed and demonstrated with a case study if a sample variation/variance (σ/σ2 ) was to be compared with a targeted variation/variance (σ/σ2 ). If one who wish to compare 2 sample variation/variances (σ/σ2 … Continue reading

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How to proceed Analyze phase ? Hypothesis Testing – Part 6 (Test for Single Variance)

As discussed in previous blog, t test and ANOVA were the statistical tools for those interested to find out if significant differences in the mean ( µ ) level of response produced by different methods or treatments. However, it is … Continue reading

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