The data set is from a case-control study of smoking and Alzheimer’s disease. The data set has two variables of main interest:

Q1 Describe the largest group that has Alzheimer. Discuss it by number of cigarettes per day.

The largest group of people with alzheimers is the non smoking group. This could be less relevant because most people do not smoke cigarettes. ## Q2 Describe one group that has more cases than expected given independence (by chance). Discuss it by number of cigarettes per day. The people that have dementia and smoke 20 cigarettes a day because I could not imagine a correlation between smoking cigarettes and dementia ## Q3 Does smoking seem to matter in determining Alzheimer? Discuss your reason using the masaic chart above. I would not imagine that Alzheimers is affected by cigarettes because Alzheimers is present amongst a majority of elderly people. ## Q4 Create correlation plot for RailTrail. Hint: The RailTrail data set is from the mosaicData package. ## Q5 What variables have positve correlation with the number of trail users (volume)? The variables that have positive correlations with high temperature, average temperature, summer, and low temperature. ## Q6 What season seems to be most popular for trail users? The season that is most popular is summer ## Q7 The correlation coefficient between hightemp and cloudcover is quite small. Would you be sure that the two variables are not related at all? Create scatter plot. After examing the scatter plot, would you conclude that the two variables are not related at all? Hint: Discuss your reason by explaining your scatter plot. There seems to be no real correlation because there is no slope of pattern to it. ## Q8 Hide the messages, the code and its results on the webpage. Hint: Use message, echo and results in the chunk options. Refer to the RMarkdown Reference Guide.

Q9 Display the title and your name correctly at the top of the webpage.

Q10 Use the correct slug.