Homework 03

Due date: 2022-09-16.

  1. Read OS4 Sections 2.1.2 and 2.1.4

Use the data set loan50 contained in the package openintro. To access this data set, first load the package with the function library and then call the function data on loan50. See the lecture Summary Statistics for examples.

  1. Read the helpfile for a description of this data set. In the console (not your homework assignment), run
?loan50
  1. Pick a numerical variable and print the first 7 observations using the R function head. Then print the last 10 observations using the function tail.

  2. Pick a numerical variable and calculate the mean and the median, using the functions mean and meadian. If one is bigger than the other, explain why that is probably the case.

  3. Pick a numerical variable and calculate the standard deviation and the interquartile range, using the functions sd and IQR.

  4. Pick a numerical variable and calculate a quantile of your choice. Interpret this statistic in the context of the data.