CSC121S2021Lab5 < CenterForComputing

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---+Lab 5 for CSC 121
---++Overview
For this lab you are to re-work the previous lab to use functions.
---++Details for computing
   * Do not use any statistical packages from Python.  You are to do all the computing yourself
   * Write one function to get the group of grades from the user and return it as a tuple.  This group of grades is terminated by a -99
   * Write a second function to compute the mean (average).  It should have one parameter (the tuple of grades) and return one number (the mean)
   * Write a third function to compute the standard deviation.  It should have one parameter (the tuple of grades) and return one number (the standard deviation)
   * Write a fourth function that will compute the letter grade for a given grade based on the mean and standard deviation.  It should have three parameters (grade, mean, standard deviation) and return a single letter.  Use the scale from the previous lab.
   * Write a main program that uses the previous functions to get a group of grades and output the letter grade for each item.  It should use the previous functions.
---++For those that want a challenge and have successfully completed the above
Figure out how to read the grades from a file using the end of file to signal the end of the data.  This is to be done on your own without help from any other person -> you can use the textbook only.
Topic revision: r1 - 2021-08-27 - cathybareiss