Texas Instruments TI-82 STATS Getting Started
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Texas Instruments TI-82 STATS Getting Started

Ti ti-82: quick start
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  • Page 1 Getting Started with the TI-82 STATS...
  • Page 2 Texas Instruments, regardless of the form of action, shall not exceed the purchase price of this calculator. Moreover, Texas Instruments shall not be liable for any claim of any kind whatsoever against the use of these materials by any other party.

  • Page 3: Table Of Contents

    Contents About the TI-82 STATS...1 About this book ...2 TI-82 STATS keys...3 Turning the TI-82 STATS on and off...4 Home screen...5 y and ƒ keys ...7 ‘ and y 5...8 Entering an expression ...9 TI-82 STATS menus ...10 Editing and deleting ...13 Using ¹...
  • Page 4 Calculating a linear regression...43 Calculating statistical variables ...44 Using the MATRIX Editor...45 Error messages ...49 Resetting defaults ...50 Connecting to a computer ...51 Quick reference...51 Texas Instruments (TI) Support and Service...53 Battery precautions...54...

  • Page 5: About The Ti-82 Stats

    The CD included with your TI-82 STATS package also includes an electronic guidebook, which is a complete reference manual for the TI-82 STATS. If the CD is not available, you can download a copy of the electronic guidebook from the Texas Instruments web page at education.ti.com/guides...

  • Page 6: About This Book

    This Getting Started Guide was designed for: students who are using a graphing calculator for the first time. student who are using the TI-82 STATS for the first time. students who need a quick review of procedures for common operations on the TI-82 STATS.

  • Page 7: Ti-82 Stats Keys

    TI-82 STATS keys Provides access to the function or character shown above each key in green. ƒ Provides access to the characters shown above each key in orange. É Turns on the TI-82 STATS. ‘ Clears (erases) the entry line...

  • Page 8: Turning The Ti-82 Stats On And Off

    É key. OFF is the second function of É. When you turn off the TI-82 STATS, all settings and memory contents are retained. The next time you turn on the TI-82 STATS, the home screen displays as it was when you last used it.

  • Page 9: Home Screen

    Home screen When you turn on your TI-82 STATS the first time, you should see this screen: If you cannot read the text on the screen, press the y key and then press and hold † or }. Pressing † lightens the screen and } darkens the screen.
  • Page 10 Home screen (continued) Example: Add 2 + 3 on the home screen. Press 2 Ã 3 Í Note: Results are displayed on the next line (the answer line), not on the entry line. Example: Multiply 5 x 4. Press 5 ¯ 4 Í...

  • Page 11: Y And Ƒ Keys

    The ƒ key lets you enter the alphabetic characters and some special symbols. To enter T, for example, press ƒ (and then release it) and then press ¶. In this book and in the TI-82 STATS Guidebook, this key combination is indicated by ƒ [ If you have several alphabetic characters to enter, press y 7 to avoid having to press the ƒ...

  • Page 12: And Y 5

    The ‘ key erases the home screen. This key is located just below the four blue arrow keys at the upper right corner of the TI-82 STATS keyboard. If you press ‘ during an entry, it clears the entry line. If you press ‘ when the cursor is on a blank line, it clears everything on the home screen.

  • Page 13: Entering An Expression

    Entering an expression An expression consists of numbers, variables, operators, functions, and their arguments that evaluate to a single answer. 2X + 2 is an expression. Type the expression, and then press Í to evaluate it. To enter a function or instruction on the entry line, you can: Press its key, if available.

  • Page 14: Ti-82 Stats Menus

    TI-82 STATS menus Many functions and instructions are entered on the home screen by selecting from a menu. To select an item from the displayed menu: Press the number or letter shown at the left of that item. — or —...
  • Page 15 TI-82 STATS menus (continued) Example: Change the FORMAT menu setting to display grid points on the graph. Press † † ~ Í Example: Turn off the display of grid points. y . † † Í Note: Press to the home screen.
  • Page 16 VARS menu — to select variable names to paste to the home screen. STAT PLOTS menu — to define statistical plots. CATALOG menu — to select from a complete, alphabetic list of all TI-82 STATS built-in functions and instructions. FORMAT menu — to define a graph’s appearance. y >...

  • Page 17: Editing And Deleting

    Editing and deleting You can change any expression or entry using the backspace | key, the delete { key, or the insert y 6 key. You can make a change before or after you press Í. Example: Enter the expression 5 expression to 5 Press 5 ¡...
  • Page 18 Editing and deleting (continued) Press | | { { ¹ 5 Í Example: Change the example above to 5 y [ to recall the expression and y 6 to insert + 2 into the expression. Press | | y 6 Ã...

  • Page 19: Using ¹ And Ì

    Using ¹ and Ì Many calculators (including the TI-82 STATS) make a distinction between the symbols for subtraction and negation. Use ¹ to enter subtraction operations. Use Ì to enter a negative number in an operation, in an expression, or on a setup screen.
  • Page 20 2 5 ¹ Ì 1 0 Í Note: Notice that the TI-82 STATS displays a slightly different symbol for negation and subtraction to make it easier for you to distinguish between the two. The negative symbol is raised and slightly shorter.

  • Page 21: Using Parentheses

    Using parentheses Since all calculations inside parentheses are completed first, it is sometimes important to place a portion of an expression inside parentheses. Example: Multiply 4*1+2; then multiply 4*(1+2). Press 4 ¯ 1 Ã 2 Í 4 ¯ £ 1 Ã 2 ¤ Í...
  • Page 22 Using parentheses (continued) Example: Divide 1/2 by 2/3. Press £ 1 ¥ 2 ¤ ¥ £ 2 ¥ 3 ¤ Í Example: Calculate 16 ^ Press 1 6 › £ 1 ¥ 2 ¤ Í Example: Calculate (L3) Press £ Ì 3 ¤ ¡ Í...

  • Page 23: Storing A Value

    Storing a value Values are stored to and recalled from memory using variable names. Example: Store 25 to variable A and multiply A by 2. Press 2 5 ¿ ƒ [ Í 2 ¯ ƒ [ Í — or — ƒ...
  • Page 24 Storing a value (continued) Example: Find the value of 2X Press Ì Ë 5 ¿ „ Í (stores L.5 to X) 2 „ › 3 ¹ 5 „ ¡ ¹ 7 „ Ã 1 0 Í You can remove a value stored to a variable using the DELVAR function or by storing 0 to the variable.

  • Page 25: Graphing A Function

    Graphing a function Displays the Y= Editor, where you can enter one or more functions or expressions to graph. „ Lets you set Lets you enter one the viewing of four symbols: window to X (if you are in produce the Function mode), T best display (in Parametric...
  • Page 26 Graphing a function (continued) To graph a function, you must: 1. Display the Y= Editor. 2. Enter the function. 3. Display the graph. Note: If you previously changed graph type in the mode settings, you must change the type back to Func (the default setting) before you graph. Example: Graph the function Y = X Press...

  • Page 27: Changing Mode Settings

    Changing mode settings The mode settings determine how entries are interpreted and how answers are displayed on the TI-82 STATS. Example: Change the mode setting for decimals from Float to 3 decimal places. Press † ~ ~ ~ ~ Í...
  • Page 28 Changing mode settings (continued) The mode menu includes the following settings: Setting Numeric notation Decimal Angle measure Type of graph Plot type Sequential or simultaneous graphing Real or complex mode Screen display Choices Normal: for example, 12345.67 (scientific): for example, 1.234567â4 (engineering): for example, 12.34567â3 Float: lets the number of decimal places change...
  • Page 29 † ~ Í 2 ¥ 3 ¯ 2 Í Your first reaction to this example is that the calculator has produced a wrong answer. But you have set it to round to 0 decimal places (the nearest whole number), so for this setting the answer is correct.

  • Page 30: Setting The Graphing Window

    Setting the graphing window To obtain the best view of the graph, you may need to change the boundaries of the window. To display the WINDOW Editor, press p . Window variables (shown in WINDOW Editor) The Xmin, Xmax, Ymin, and Ymax variables represent the boundaries of the viewing window.
  • Page 31 Setting the graphing window (continued) Note: Values are stored as you type them; you do not need to press Í . Pressing window variable. 4. After you have made all changes, press y 5 to close the WINDOW Editor (or s to display the graph). Example: Change the window settings to display a maximum X value of 25, a minimum X value of L25, a maximum...

  • Page 32: Using Q

    Using q The TI-82 STATS has ten predefined window settings that let you quickly adjust the graph window to a predetermined level of magnification. To display this menu, press q. Selection 1: ZBox 2: Zoom In 3: Zoom Out 4: ZDecimal...

  • Page 33: Building A Table

    Building a table Tables are useful tools for comparing values for a function at multiple points. Example: Build a table to evaluate the function Y = X each integer between L10 and 10. Press z † † † Í (sets function graphing mode) „...
  • Page 34 Building a table (continued) Press Ì 1 0 Í (sets TblStart; default settings shown for the other fields are appropriate) † Note: Press repeatedly to see the changes in X and Y. Clearing the Y= Editor Before proceeding with the remaining examples in this guide, clear the Y= Editor.

  • Page 35: Using The Catalog

    Using the CATALOG The CATALOG is an alphabetic list of all functions and instructions on the TI-82 STATS. Some of these items are also available on keys and menus. To select from the CATALOG: 1. Position the cursor where you want to insert the item.

  • Page 36: Performing Simple Calculations

    Í Note: You can perform an operation using the last answer without entering the value again. When you do this, (as you did in the step 2 above), the TI-82 STATS enters Finding the least common multiple Example: Find the least common multiple of 15 and 24.
  • Page 37 Performing simple calculations (continued) Finding the square root Example: Find the square root of 256. Press y C 2 5 6 ¤ Í Finding the factorial of numbers Example: Compute the factorial of 5 and 30. Press 5  ~ ~ ~ 4 Í...
  • Page 38 Performing simple calculations (continued) Solving trigonometric functions Example: Find the sine of an angle of 72¡. Press ˜ 7 2 y ; Í ¤ Í Note: If you are solving multiple problems using angles, be sure that mode is set to Degree. If you are in Radian mode and do not wish to change the mode, you can use this example) to add the degree symbol to the calculation and override the Radian mode setting.

  • Page 39: Using The Equation Solver

    Using the equation solver You can use the TI-82 STATS equation solver to solve for a variable in an equation. Example: Find the roots for the equation X - 13X - 48 = 0. Press Result  } Í Note: If you do not see...
  • Page 40 ƒ \ The two roots are M3 and 16. Since you did not enter a guess, the TI-82 STATS used 0 (the default guess) and first returned the answer nearest 0. To find other roots, you must enter another guess. In this example, you entered 100.

  • Page 41: Entering Data Into Lists

    Entering data into lists You can enter data into lists using either of two methods: Using braces and ¿ on the home screen — or — Using the statistical list editor. Using ¿ Example: Store 1, 2, 3, and 4 to list 1 (L1). Press y E 1 ¢...
  • Page 42 Entering data into lists (continued) Using the statistical list editor Example: Store 5, 6, 7, and 8 to list 2 (L2). Press … Í ~ } ‘ Í (if L2 already contains data) 5 Í 6 Í 7 Í 8 Í y 5 y e Í...

  • Page 43: Plotting Data

    You will need to: 1. Determine which lists contain your data. 2. Tell the calculator which lists of data you want to plot and define the plot. 3. Display the plot. Determine which lists contain your data Press …...
  • Page 44 Plotting data (continued) Tell the calculator which lists you want to plot Press Result 4 Í (turns plots off if any plots are on) Í...
  • Page 45 Plotting data (continued) Press Í (turns Plot1 on) † † y 9 Í (enters L1 as the Xlist) † y 9 † Í (enters L2 as the Ylist) † ~ Í (selects + as the plotting mark) Result...
  • Page 46 Plotting data (continued) Press o ‘ Note: This step is optional and is not necessary unless there is a previous entry in the Y= Editor. If there are additional entries in the Y= Editor, press Display the plot Press q } } Í (selects ZoomStat) Note: If you would like to add the regression line to a scatter plot, follow the instructions on page 43, adding Y1 to the end of the instruction:...

  • Page 47: Calculating A Linear Regression

    Calculating a linear regression If you wish to calculate the linear regression for data, you can do so using the LinReg instruction from the … CALC menu. Example: Calculate the linear regression for the data entered in L1 and L2 (on pages 37 and 38). Press …...

  • Page 48: Calculating Statistical Variables

    Calculating statistical variables The TI-82 STATS lets you easily calculate one-variable or two- variable statistics for data that you have entered into lists. Example: Using the data that you entered into L1 on page 37, calculate one-variable statistics. Press … ~ Í...

  • Page 49: Using The Matrix Editor

    Using the MATRIX Editor Creating a new matrix Press  | Í 2 Í 2 Í 1 Í 5 Í 2 Í 8 Í Note: When you press next cell so that you can continue entering or editing values. To enter a new value, you can start typing without pressing but you must press Í...
  • Page 50 Using the MATRIX Editor (continued) Using matrices to solve systems of equations You can solve several equations simultaneously by entering their coefficients into a matrix and then using the rref (reduced row- echelon form) function. For example, in the equations below, enter 3, 3, and 24 (for 3X, 3Y, and 24) in the first row, and 2, 1, 13 (for 2X, 1Y, and 13) in the second row.
  • Page 51 Using the MATRIX Editor (continued) Press 3 Í 3 Í 2 4 Í 2 Í 1 Í 1 3 Í  ~ } } } } } Í Result...
  • Page 52 Using the MATRIX Editor (continued) Press  † Í Í You can interpret the resulting matrix as: [1 0 5] represents 1X + 0Y = 5 or X = 5 [0 1 3] represents 0X + 1Y = 3 or Y = 3 The solution to this system of equations is X = 5, Y = 3.

  • Page 53: Error Messages

    Error messages Occasionally, when you enter a function or instruction or attempt to display a graph, the TI-82 STATS will return an error message. Example: Enter the least common multiple function lcm( followed by only one number. Press  ~ } } Í...

  • Page 54: Resetting Defaults

    If you are getting unexpected results, or if another person has used your calculator and may have changed the settings, you should consider resetting defaults on the TI-82 STATS. Press WARNING: If you reset All Memory in step 3 above, you will delete stored variables, lists, applications, and programs.

  • Page 55: Connecting To A Computer

    TI Connect™ software and a TI Connectivity cable. The software is included on the CD in the TI-82 STATS package. When you connect to the TI Connect ™ software, the TI-82 STATS calculator will be identified by TI Connect ™ as a TI-83 calculator.

  • Page 56: Quick Reference

    Quick reference Press y † ƒ † ƒ } † } ‘ Darken the screen Lighten the screen Move the cursor to the end of an expression Move the cursor to the beginning of an expression Page down to the next screen (on menus) Page up to the next screen (on menus) Place your last entry on the current entry line on the home screen...

  • Page 57: Texas Instruments (Ti) Support And Service

    Texas Instruments (TI) Support and Service For general information For more information about TI products and services, contact TI by e-mail or visit the TI Internet address. E-mail inquiries: Home Page: Service and warranty information For information about the length and terms of the warranty or...

  • Page 58: Battery Precautions

    Battery precautions Take these precautions when replacing batteries. Do not leave batteries within the reach of children. Do not mix new and used batteries. Do not mix brands (or types within brands) of batteries. Do not mix rechargeable and non-rechargeable batteries. Install batteries according to polarity (+ and - ) diagrams.

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