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S5 Accuracy All Sections

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Security Today’s Topic Information Quality IS Basics E-commerce AccessExcel PowerPoint Types of IS Systems Development Database Processing & Design Spreadsheet Design Business Intelligence Functional, Crossfunctional & Interorganizational Telecommu -nications Hardware & Software

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Clarity Simplicity Spreadsheet Design includes Accuracy Verifiability Efficiency Basic Formatting Conditional Formatting Freeze Panes Page Setup Sorting Charts Layout Choices Documentation Data Validation Protection Formulas Functions Formulas Functions Macros implemented with

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Define the accuracy goal. Apply the spreadsheet design goal of accuracy.

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SUM Function AVERAGE Function MIN & MAX Functions COUNT Function 3D Calculations Range Name Change Legend Change Axis Add Data Series ‘Other’ Pie Slice

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Know the order of operations. Select the correct function or construct the correct formula. (Choose a function over a formula.) Isolate assumptions. Check relative and absolute cell references. Double-check all calculations.

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Parentheses Multiplication and Division Addition and Subtraction

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1. 6 / 2 * 4 = 2. 3 + 2 * 2 – 1 = 3. ( 2 * 5 ) + 15 / 5 =

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Formula ◦ created by you ◦ = A1 + A10 Function ◦ keyword defined by Microsoft ◦ =SUM(A1:D1) ◦ Functions are more flexible than formulas

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=B3+B4+B5+B6 =SUM(C3:C6) If you delete Row 5 =SUM(C3:C5)

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=cell reference Used to transfer data from one cell to another Benefit over copy & paste: redundant location is dynamic

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SUM AVERAGE MIN and MAX COUNT

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Store numbers in cells Write equations to point to cells containing numbers

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Assumption =E2+3 is incorrect =E2+H2 is correct

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Isolated Assumptions? How Do You Spend Your Study Time?

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How Do You Spend Your Day?

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Cell AddressReferenceChanges when Copied A1RelativeVertically or Horizontally $A$1AbsoluteNever $A1MixedVertically A$1MixedHorizontally The cell addresses in the copied calculation may change. Any changes are made according to the direction and distance of the destination cell from the original source cell.

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Is the formula entered going to be copied? If so, which direction? If it’s copied vertically, do you want the row references to change? If it’s copied horizontally, do you want the column references to change? Do you want such a change to take place?

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1. Will you copy this function? 2. If so, which direction: vertical or horizontal? 3. If you copy vertically, Excel will automatically change all relative row references. Do you want those row references to change? =SUM(B2:D2)

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Mixed Cell References Needed? How Do You Spend Your Study Time?

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What equations would you use to calculate ◦ Weighted Credits for each course ◦ Total Semester Credits ◦ Total Semester Weight Credits ◦ GPA Remember to: ◦ Choose a function over a formula ◦ Isolate assumptions ◦ Check relative and absolute cell references

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IF function displays one of two possible values depending on the outcome of a logical test Logical Test compares two things If the Logical Test equates to TRUE, the cell is filled with the True Value. If the Logical Test equates to FALSE, the cell is filled with the False Value.

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If a course requires more than 3 hours of study time per week, we will label it HARD. Three or less hours of study is labeled EASY.

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What cell is used for the logical test? What is the logical test? What is the true value? False value? 3

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IF Grade Example Use the IF function to assign Pass/Fail grades. =IF(V4>=.6,”P”,”F”)

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