Using The TI-83/84 Plus Chapter 2: Descriptive Statistics & Box-Plots

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Using The TI-83/84 Plus Chapter 2: Descriptive Statistics & Box-Plots

? Entering Data into Lists:

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1. Press the STAT button. 2. Highlight the EDIT option (using the arrows) and hit ENTER . 3. Choose a list (from L1, L2, . . ., L6) using the arrows and enter the values by column.

Hit Enter or the down-arrow to move down the column. 4. You can clear a list by highlighting the list name and hitting the Clear button.

? Getting Descriptive Statistics

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1. Press the STAT button.

2. Highlight CALC then highlight 1-Var Stats and press ENTER .

3. Enter the list from the blue options above the # 1 - 6 buttons using the 2nd button. In earlier versions you press ENTER after you have 1-Var Stats L1 on the screen. In later versions you scroll down to Calculate and then press ENTER .

4. The results take up more than the screen can hold. You can scroll down using the button.

5. You get a lot of bang for you buck on this. They are displayed in this order: ? x? = the mean ? x = the sum of the values (we don't really need this). ? x2 = the sum of the squared values (we don't need this either). ? Sx = the sample standard deviation ? x = the population standard deviation (use only for population data) ? n = the sample size ? The 5-Number Summary: (min, Q1, Q2 = median, Q3, max).

? Box-Plots using STAT PlOT

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1. Press the 2nd button and the Y = button to access the STAT PLOT menu. 2. Hit ENTER on one of the first three plot options and turn it on. 3. Highlight one of the box plot options.

The Box and Whiskers Plot (first of the two options) displays outliers with a selected marker. The Box Plot (second of the two options) does not define or plot outliers. 4. Insert the data list at Xlist. 5. Then hit GRAPH . 6. You can change the viewing window with the options in the WINDOW menu.

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