# data analysis in r 4

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**Assignment 1: Data Analysis in R**

**Read**the income dataset, â€œzipIncomeAssignment.csvâ€, into R. (You can find the csv file in iLearn under the Content -> Week 2 folder.)- Change the column
**names**of your data frame so that*zcta*becomes*zipCode*and*meanhouseholdincome*becomes*income*. - Analyze the
**summary**of your data.What are the mean and median average incomes? **Plot**a scatter plot of the data.Although this graph is not too informative, do you see any outlier values?If so, what are they?- In order to omit outliers, create a
**subset**of the data so that: - Whatâ€™s your new mean?
- Create a simple
**box plot**of your data.Be sure to add a title and label the axes. - Make a
*ggplot*that consists of just a scatter plot using the function*geom_point()*with position = â€œ*jitterâ€*so that the data points are grouped by zip code.Be sure to use*ggplot*â€™s function for taking the log_{10}of the y-axis data.(Hint: for*geom_point*, have*alpha*=0.2). - Create a new
*ggplot*by adding a box plot layer to your previous graph.To do this, add the*ggplot*function*geom_boxplot()*.Also, add color to the scatter plot so that data points between different zip codes are different colors.Be sure to label the axes and add a title to the graph.(Hint: for*geom_boxplot*, have*alpha*=0.1 and*outlier.size*=0). - What can you conclude from this data analysis/visualization?

$7,000 < income < $200,000 (or in R syntax , income > 7000 & income < 200000)

HINT: Take a look at: https://www.tutorialspoint.com/r/r_boxplots.htm (specifically, Creating the Boxplot.) Instead of â€œmpg ~ cylâ€, you want to use â€œincome ~ zipCodeâ€.

In the box plot you created, notice that all of the income data is pushed towards the bottom of the graph because most average incomes tend to be low.Create a new box plot where the y-axis uses a log scale.Be sure to add a title and label the axes. For the next 2 questions, use the *ggplot* library in R, which enables you to create graphs with several different types of plots layered over each other.

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