African national Congress is the republic of South Africa's governing political party. It has been the ruling party of post apartheid South Africa on the nàtional level, beginning with the election of Nelson Mandela in the 1994' s election.
Answer: The correct answer is : The central limit theorem
Explanation: This is a fundamental theorem of probability and statistics. When the sample size is large enough, the distribution of the means follows approximately a normal distribution. The theorem can be applied regardless of the form of population distribution.
Answer: D. Online survey
Explanation: Interview survey is time consuming and John does not have the luxury of time. Phone survey is fast but needs money and John is cash trapped. Longitudinal survey requires that a long time is spent on the survey and it is expensive. John does not have both the time and money. Mail survey is cheap but needs time to get in the answers and John does not have much time. The best option for John is online survey because online survey are less time consuming, cheaper, and results gotten faster.
