To Do List for Lab 3 Stats

• Ref: Display of Statistical Distribution
• On-line Calculate/Plot
• class web directory which includes three needed data files: class_heights.dat 50.dat 1000.dat

1. Using file class_heights.dat...

   1. By hand make a cumulative fraction plot of this data.

   2. By hand make a percentile plot of this data. Include error bars!
      Note: the above calculate/plot web site can show you what these plots should look like (but it won't do error bars). Nevertheless, I want you make hand plots on graph paper.

2. Using file 50.dat and the above calculate/plot web site...

   3. Copy and paste this data into the above calculate/plot web site. Produce and tape into you lab notebook two hardcopy percentile plots: one with a normal y-axis and the other with a probability-scaled y-axis.

   4. On average for normally distributed data, the mean is the median and 68.3% of the data is within one standard deviation of the mean. Label on one of your hardcopy plots the following points and the corresponding percentile:

      X_median -
      X_median
      X_median +

      Report what percent of this data is within one standard deviation of the median.

   5. Produce and tape into you lab notebook a hardcopy cumulative fraction plot.

3. Using file 1000.dat ...

   6. By hand make a histogram of this data. Include error bars! (You can decide what bins to use.)