Anne
Dawson: CSCI120A_LAB5_FA04.htm
Last
updated: Thursday 30th September 2004, 17:01 PT
This
document is subject to change without notice.
Please
report any errors or omissions in this document:
adawson@coquitlamcollege.com
Special instructions:
For this assignment you may work in teams of 2, or alone. This lab is due at the end of the lab
session.
CSCI120A
Introduction
to Computer Science and Programming
Fall 2004
Lab
Assignment 5
Calculation of
Mean and Standard Deviation
Step 1
Using the Internet, search for the formula to calculate mean and
standard deviation of a set of numeric values.
Note: you do not type in the code of your program until Step 4.
Your program asks the user for the number of values to be
entered, then requests the numbers, and outputs the mean and standard deviation
of the numbers. You must use at least one function in your program to perform
the calculations.
Step 2
Design an algorithm (the steps to solve the problem). You should
have the algorithm approved by your instructor before going on to the next
step.
The following web page will help you design your algorithm and
pseudocode:
http://www.coquitlamcollege.com/adawson/Pseudocode.htm
Step 3
Development the pseudocode from your algorithm.
The following web page will help you design your algorithm and
pseudocode:
http://www.coquitlamcollege.com/adawson/Pseudocode.htm
Step 4
Using your pseudocode as a guide, implement your program in the
Python language. Use the IDLE GUI to edit and run your program:
http://www.coquitlamcollege.com/adawson/Python_Editor_IDLE.htm
Your program should start with a comment block that contains the
following information:
#
File: lab5.py
#
Purpose: Mean
and Standard Deviation Calculations
#
Programmer: [your name]
#
Partner: [your
partner's name]
# Course: CSCI120A
#
Date: Monday 18th October 2004
# Test
data:
Please note: any lines in a Python program that start with the #
symbol are known as comments. Comments are ignored when the program runs, but
are useful when we read a program, because they supply information about
the program. They are always used
at the top of a program to supply information about the purpose of a program,
its file name, the programmer etc, as shown above. They are also used in the
body of a program to explain parts of the program which may be hard to
understand. Example programs in this course will demonstrate the correct use of
comments. You are expected to supply the above set of comments (updated
appropriately) for all of your lab and homework programming assignments.
Step 5
Test your program by running supplying
your own test data. You should test your program with at least 3 sets of test
data. Show your test data and results in comments at the top of your program.
Step 6
At the end of the class, save your
program file (lab5.py) to your folder on the network in:
CSCI120A\Week07\Lab05
Program
points will be based on the following marking scheme:
Marking
Scheme: CSCI120A - Lab 5 - Mean
and Standard Deviation Calculations
Student
name(s):
|
Category |
Points |
Description |
|
Algorithm |
15 |
An informal description of the
steps that must be taken to solve the problem. |
|
Pseudocode |
15 |
A formal description of the
steps that must be taken to solve the problem. |
|
Comments |
10 |
The program is commented appropriately. |
|
Style |
15 |
The source code should use meaningful variable
names (identifiers). |
|
Output |
15 |
Screen prompts and results should be
user-friendly. |
|
Correctness |
10 |
The program should output correct results. |
|
Completeness |
10 |
The program should be complete. |
|
Test |
10 |
Comments in the code explain how the code was
tested. |
Assignment Presentations : In the next class, a random selection
of lab assignment programs will be presented to the CSCI120A group.