Randomization

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This section provides random allocations for randomized study designs:

• Series x to y

• Intervention-control pairs

• Two independent groups

• Block randomization to k treatments

• Preference allocation (menu item only shows with workbook open)

A good quality pseudo-random number generator is used to randomize series of numbers for each of the types of allocation. The random number generator is reseeded each time it is used, therefore, there is extremely little risk using the same (pseudo-)random number series for different randomizations unless you specify the same seed for the random number generator. For technical information on the random number generator used here please see random number generator.

Another section of StatsDirect generates random deviates from different probability distributions (uniform, normal, gamma etc.), see random numbers.