Examine the results of a study1 investigating whether fast food consumption increases one’s concentration of phthalates, an ingredient in plastics which has been linked to multiple health problems including hormone disruption. the study included 8877 people who recorded all the food they ate over a 24-hour period and then provided a urine sample. two specific phthalate byproducts were measured (in ng/ml) in the urine: dehp and dinp. find a 95% confidence interval for the difference, μf-μn, in mean concentration between people who have eaten fast food in the last 24 hours and those who haven’t. the mean concentration of dehp in the 3095 participants who had eaten fast food was x¯f=83.6 with sf=194.7 while the mean for the 5782 participants who had not eaten fast food was x¯n=59.1 with sn=152.1.

round your answers to one decimal place.

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.

do your own work and don"t cheat.

step-by-step explanation:

the answer is 0.000652422

but if you ment to ask what is 6131 divided by 4, it is 1532.75.

step-by-step explanation:

c

step-by-step explanation: easy math