physical chemistry - What is the pKa Range for weak acids and bases?

Am I correct in assuming that the following is true?

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  $\mathrm pK_\mathrm a < 3$ is for a strong acid

  
  


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  $3 < \mathrm pK_\mathrm a < 7$ is for a weak acid

  
  


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  $7 < \mathrm pK_\mathrm a < 11$ is for a weak base

  
  


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  $\mathrm pK_\mathrm a > 11$ is for a strong base