| 11. | For instance, the factorial function can be expressed as:
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| 12. | The second one is based on analytic bounds for the factorial function.
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| 13. | This is a regular function that calculates the factorial of a number:
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| 14. | The simplest factorial experiment contains two levels for each of two factors.
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| 15. | The notation used to denote factorial experiments conveys a lot of information.
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| 16. | Factorial experiments can involve factors with different numbers of levels.
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| 17. | A factorial experiment allows for estimation of experimental error in two ways.
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| 18. | In this case, fractional factorial designs may be used.
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| 19. | The first few exponential factorials are 9, 262144, etc ..
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| 20. | So, for example, 262144 is an exponential factorial since
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