KIBU2023-02-092023-02-092022-08-29http://erepository.kibu.ac.ke/handle/123456789/7823STA 426;Large sample theoryenAttribution-NonCommercial-ShareAlike 3.0 United Stateshttp://creativecommons.org/licenses/by-nc-sa/3.0/us/STA 426;Large sample theoryLarge sample theorySTA 426Other