A company that provides tutoring is evaluating whether or not it’s tutoring services are effective at boosting students’ class rank. A group of 50 students is participating in this study. Each student’s class rank was measured three times, once before beginning the tutoring service, a second time after 1 semester in the tutoring service, and a third time after 2 semesters in the tutoring service. What is the correct statistical test to determine if the tutoring services are effective at boosting students’ class rank?

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

answer for #1 is c

answer for #2 is d

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step-by-step explanation:

answer: options

step-by-step explanation: