For each of 40 students in one county the number of days absent from school in the 1) previous year were counted, with the results shown in the frequency table: Number of absent days 0 1 2 3 4 5 Number of students 24 7 5 2 1 1 Construct a 90%confidence interval for the average number of days absent from school of all students in the county.

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step-by-step explanation:

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.

d

step-by-step explanation:

christopher is 272,195 year old

step-by-step explanation: