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What is the mean score of the four students

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Problem 1) An auto analyst is conducting a satisfaction survey, sampling from a list of 10,000 new car buyers. The list includes 2,500 Ford buyers, 2,500 GM buyers, 2,500 Honda buyers, and 2,500 Toyota buyers. The analyst selects a sample of 400 car buyers, by randomly sampling 100 buyers of each brand. This is an example on:

A) Simple Random Sampling
B) Systematic Sampling
C) Stratified Sampling
D) Cluster Sampling

Problem 2) The quality assurance (QAU) unit at FBSU is planning to study the mean GPA of the students graduated in the last year. The University has four colleges: Business, Computing, Engineering, and Sciences and Humanities. The QAU selects a random sample of 100 students from the graduated students for the last year. This is an example on:

A) Simple Random Sampling
B) Systematic Sampling
C) Stratified Sampling
D) Cluster Sampling

Problem 3) The mean score in a statistics exam of 3 students is 72.4. If the fourth student has scored 80, what is the mean score of the four students?

A) 74.30
B) 76.30
C) 74.93
D) 73.92

Reference no: EM132685095

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