WEEK 4_student ver_BASIC STATISTIC 2.pptx

WEEK 4_student ver_BASIC STATISTIC 2.pptx - Degree of...

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Degree of freedom For population, the d.o.f is n For sample, the d.o.f is n-1
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Significant test Purpose: to determine whether the difference between two or more values is too large to be explained by error Types of significance test - One-tailed significance test - Two-tailed significance test
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Two-tailed significance test Hypothesis: null hypothesis alternative hypothesis If we conduct significance test at We accept null hypothesis if 95% confidence around contain and we reject null hypothesis if lies in the shaded areas at either end of normal distibrution curve
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One-tailed significance test Hypothesis: null hypothesis alternative hypothesis If we conduct significance test at We accept null hypothesis if 95% confidence around contain and we reject null hypothesis if lies in the one of shaded areas at either end of normal distibution curve
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1 and 2-tailed significance test 2-tailed: 1 tailed: or
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F test Used to evaluate whether a difference between s 2
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