Question: OB. Systematic sampling OC. Simple random sampling D. Cluster random sampling QUESTION 6 For a normal distribution with mean equal to 80 and standard deviation

OB. Systematic sampling OC. Simple random sampling D. Cluster random sampling

OB. Systematic sampling OC. Simple random sampling D. Cluster random sampling QUESTION 6 For a normal distribution with mean equal to 80 and standard deviation equal to 3, approximately what percent of the observation will be between 74 and 86? A. 50% B. 68% OC. 99.7% OD. 95% QUESTION 7 Which of the following is not true in a standard normal distribution

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