Bluman A.G. Elementary Statistics- A Step By Step Approach

64 Chapter 2 Frequency Distributions and Graphs8. Click File>Exit.9. Save the project as Ch2-3.mpj.TI-83 Plus orTI-84 PlusStep by StepInputInputConstructing a HistogramTo display the graphs on the screen, enter the appropriate values in the calculator, using theWINDOW menu. The default values are X min 10, X max 10, Y min 10, and Y max 10.The X scl changes the distance between the tick marks on the x axis and can be used to changethe class width for the histogram.To change the values in the WINDOW:1. Press WINDOW.2. Move the cursor to the value that needs to be changed. Then type in the desired value andpress ENTER.3. Continue until all values are appropriate.4. Press [2nd] [QUIT] to leave the WINDOW menu.To plot the histogram from raw data:1. Enter the data in L 1 .2. Make sure WINDOW values are appropriate for the histogram.3. Press [2nd] [STAT PLOT] ENTER.4. Press ENTER to turn the plot on, if necessary.5. Move cursor to the Histogram symbol and press ENTER, if necessary.6. Make sure Xlist is L 1 .7. Make sure Freq is 1.8. Press GRAPH to display the histogram.9. To obtain the number of data values in each class, press the TRACE key, followed by or keys.OutputExample TI2–1Plot a histogram for the following data from Examples 2–2 and 2–4.112 100 127 120 134 118 105 110 109 112110 118 117 116 118 122 114 114 105 109107 112 114 115 118 117 118 122 106 110116 108 110 121 113 120 119 111 104 111120 113 120 117 105 110 118 112 114 114Press TRACE and use the arrow keys to determine the number of values in each group.To graph a histogram from grouped data:1. Enter the midpoints into L 1 .2. Enter the frequencies into L 2 .3. Make sure WINDOW values are appropriate for the histogram.4. Press [2nd] [STAT PLOT] ENTER.5. Press ENTER to turn the plot on, if necessary.6. Move cursor to the histogram symbol, and press ENTER, if necessary.7. Make sure Xlist is L 1 .8. Make sure Freq is L 2 .9. Press GRAPH to display the histogram.2–30