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  3. 4 read the article shown below and determine the response...

Question: 4 read the article shown below and determine the response...

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4. Read the article shown below, and determine the response variable and the main pre- dictor of interest. Is the study an experiment or is it observational? The data in the first table reflect the numbers in the article: stroke no stroke Clean teeth may prevent strokes teeth cleaned12 1988 once per year teeth cleaned24 776 Several groups of University researchers are investigating the link between dental disease and cardiovas- ar disease. If their preliminary find- less often Disaggregate the data! Make up a co the second set of tables. See if you can dis- of strokes are approximately the same for founding factor, and write in two groups in ings are true, regular teeth cleanings Da Prof. Walter Loesche found aggregate the data so that the proportions that hospital patients ages 65 and older ay help prevent strokes. ho had their teeth cleaned at least once a year were five times less likely to have a stroke than patients who did both teeth cleaning groups not have their teeth cleaned as often. A related study by Loesche shows that patients with coronary artery dis- ease are substantially more likely to exhibit symptoms of gum disease, including bleeding and high levels of Group 1 stroke no stroke teeth cleaned once per vear teeth cleaned less often bacteria Although the results of the study ane still preliminary, good oral hygiene may prove to be an important factor in the prevention of stroke and coronary artery disease. Group 2 stroke no stroke Compiled by Daily Staff Reporter Sam Stavis teeth cle once per year teeth cle less often
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