You and a group of friends want to know how many students in your school prefer country music. There are 460 students in your school. Each person in the group randomly surveys 20 students. The table shows the results. Favorite Type of Music Country Pop Rock Rap You 1 5 10 4 Friend A 2 3 8 7 Friend B 1 2 13 4 Friend C 1 4 10 5 Friend D 3 5 9 3 a. Use each sample to make an estimate for the number of students in your school who prefer country music. You Friend A Friend B Friend C Friend D Estimate b. Describe the center and variation of the estimates. The estimates have a median of students and a range of students.

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step-by-step explanation:

i just took the test, the correct answer is .. 31.5 in.

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.