exercise1():
  Get a datafile in text format from the class website.
  Read the data from the datafile.
  Print the first five lines.
  Compute some statistical measurements.
  Normalize the data, and recompute the statistics.
  When finished, delete the datafile.
  Downloading dataset file:

  "homes_data.txt" contains 49 rows and 9 columns.

  First five lines of data:

  (0)     1.4e+05   1.6e+05   2.8e+03        10         5         3        60      0.28   3.2e+03
  (1)     1.8e+05   1.8e+05   1.8e+03         8         4         1        12      0.43     4e+03
  (2)     1.3e+05   1.3e+05   1.3e+03         6         3         1        41      0.33   1.5e+03
  (3)     1.4e+05   1.4e+05   1.7e+03         7         3         1        22      0.46   3.2e+03
  (4)     2.3e+05   2.4e+05   2.5e+03         8         4         3         5         2   3.6e+03

  Statistics for data:

  Minimum      8.7e+04     9e+04     1e+03         5         3         1         2      0.22   1.4e+03
  Maximum      2.9e+05   3.0e+05   3.9e+03        12         6         3     2e+02       6.5   7.1e+03
  Range        2.1e+05   2.2e+05   2.9e+03         7         3         2     2e+02       6.3   5.6e+03
  Mean         1.6e+05   1.7e+05     2e+03         8       3.8       1.8        31         1   3.5e+03
  Variance       2e+09   2.1e+09   3.1e+05       1.5      0.48      0.48   9.4e+02       1.4     1e+06
  RMS          3.9e+05   4.1e+05   4.9e+03        19         9       4.5     1e+02       3.7   8.6e+03

  Statistics for normalized data:

  Minimum            0         0         0         0         0         0         0         0         0
  Maximum            1         1         1         1         1         1         1         1         1
  Range              1         1         1         1         1         1         1         1         1
  Mean            0.37      0.37      0.35      0.43      0.27      0.41      0.14      0.13      0.37
  Variance       0.048     0.046     0.037      0.03     0.053      0.12     0.024     0.036     0.031
  RMS             0.99         1      0.94       1.1      0.83       1.2      0.49      0.53      0.96

  Deleting dataset file:

exercise1:
  Normal end of execution.