Alocal supermarket organised two weeks of promotions to boost sales. the average dailly salles before the carmpaign is $10 000, which becomes $11 000 during the promotion (average over 2 weeks). which analysis below is not useful for evaluating whether the increase in sales is statistically significant?

1. check the distribution of sales data.
2. inspect for possible outliers in sales data.
3. calculate precision of the prediction
4. monitor sales for longer period of time.

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.

step-by-step explanation: hi!

35/2 is it i think maybe

well

44-3-3-3=35

35+4+4+4+4=51

so the ansewr would be 51 degreesat 7: 00