| 11. | While performing the McDonald Kreitman test, scientists also have to avoid making too numerous type II errors.
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| 12. | Significance testing did not utilize an alternative hypothesis so there was no concept of a Type II error.
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| 13. | A type II error occurs when letting a guilty person go free ( an error of impunity ).
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| 14. | But it did not examine whether a sound company got a low rating, known as a Type II error, Daily said.
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| 15. | Where a and b ( a ) depend on the desired type I and type II errors, \ alpha and \ beta.
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| 16. | The statistical power desired is estimated by one minus beta, where beta is equal to the probability of making a Type II error.
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| 17. | A type II error occurs when failing to detect an effect ( adding fluoride to toothpaste protects against cavities ) that is present.
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| 18. | For a fixed level of Type I error rate, use of these statistics minimizes Type II error rates ( equivalent to maximizing power ).
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| 19. | This can result in an overly conservative result that fails to reject the null hypothesis when it should ( a type II error ).
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| 20. | The probability of a type II error is dependent of the sample size and the actual difference between the sample value and the observed value.
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