1. Exploring Engineering Chapter 3, Part 2 Introduction to Spreadsheets

2. Spreadsheets Can Aid in Calculation, Visualization and Simulation

3. Data Visualization  Data are raw facts. For example a collection of numbers.  Information can be gained by presenting the data in a way that makes it possible to visualize the meaning of the data.

4. Organizing Data  Headings  Labels  Formatting numbers as percentages, currency, etc.  Graphs can be used to display data in a way that the significance of the numeric data can be seen.  Ordering the data by sorting.

5. Performing Computations  Spreadsheets provide built in functions to perform calculations using the data.  MAX  MIN  SUM  AVERAGE  STDEV  Etc for many, many, more functions

6. Knowledge  Knowledge results from the interpretation of information.  It takes a human being with expertise to interpret the information to gain knowledge.

7. Spreadsheets  Definition: A spreadsheet is software designed to manipulate and analyze numbers and formulas in rows and columns.  We will be using Microsoft Excel in this class. However there are similar programs such as Lotus 123.

8. The Spreadsheet

9. Cell Contents  The types of cell contents:  Alphanumeric – text  Headings  Labels  Numeric  Integers  Floating point  Equations and formulae: B1+B4/H13  Predefined Functions: Previously discussed in slide 5.

10. An Example  We will be creating a worksheet for a class grade sheet.  The input to a spreadsheet requires entering numbers in cells.  In this case the input will be grades.

11. Grade sheet  Final Grade Rubric  Assign each exam as 18% of the final score, the final exam as 36% of the final score, and homework as 10% of the final score, then a student's final score is: Final Score = 0.18*(Ex1 + Ex2 + Ex3) + 0.36*(Final Exam) + 0.10*(Homework Score)  Assign a letter grade according to:  If Final score > 80, A  If Final score > 70, B  If Final score > 65, C  If Final score > 60, D  If Final score < 60, F

12. Excel Spreadsheet Write one line then copy and paste the rest

13. Excel grade sheet See how you get the average of each exam

14. It’s easy for the grader to cheat! See how you can get the total! If you easily want to change the weighting, go to C1, or E1 or G1 etc. Notice the use of absolute K$1 and relative D4, G4, etc., addressing. Relative shifts with where you copy it but absolute fixes column or row (or both)

15. Excel Grade sheet Notice the use of the IF statement …IF(test, true, false)

16. Summary  Learn to use a spreadsheet  Use its formatting capability  Use its mathematical functions  Use its relative and absolute addressing  Use its logical functions  Use lots more!