Pressing c will allow you to identify individual

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Unformatted text preview: . 5. To display the plot, press B 9. Pressing C will allow you to identify individual points in the plot. To make a confidence interval for a population proportion: 1. Press K and scroll to the TESTS menu. Scroll down until you find the option 1–PropZInt and select it. 2. Enter the number of successes (x) and sample size (n) for your sample. (Be sure to enter the number, not proportion, of successes.) 3. Determine your confidence level and select Calculate. Press [. The screen displays the confidence interval inside a set of parentheses and reports the sample proportion and sample size. Note: Your instructor may want you to use a plus-4 interval, also known as the adjusted Wald confidence interval, or a small sample interval. To use these formulas, add 2 to the number of successes you observed and add 4 to the sample size, then follow the above procedures. 1. 2. ISBN-13: 978-0-321-57077-2 ISBN-10: 0-321-57077-4 90000 1 9 780321 570772 2 3 TI_card_570774_reprint.qxp 2/12/09 3:43 PM Page 1 TI-83/84® Descriptive Statistics: Summarizing Quantitative Variables (continued) 4. The Basics: Entering Data 5. the arrows left and right, you can choose different lists. The K button, located near the middle of the calculator, contains three important menus: EDIT, CALC, and TESTS. You select a menu and a command by moving the black highlighted boxes around with the arrow keypad. When you have selected your command, press [. Here are some important list operations to input and manipulate data in your calculator. 1. Select EDIT and 1:Edit to begin typing in your data. Use the down arrow, or press [, to scroll down the list. By moving 2. 3. To find the mean, look for the x symbol. To find the standard deviation, look for the symbol Sx. The sample size is denoted by n. Scroll down to find the five-number summary (minX, Q1, Med, Q3, and maxX) on the second screen. Using the Normal Distribution To clear a previously entered list, move the cursor so it highlights the list name and press P and press [. This is important to do every time you begin to enter a new list. To insert new lists, highlight any list name and select F H to choose INS. You may use the alphabet keys to enter any name. Plots for Displaying Quantitative Data: Boxplots, Histograms, and Scatterplots You will make all your charts from the STAT PLOTS menu. To access it, select F E. You can display up to three plots at one time for certain kinds of plots. 1. From the menu, select 1:Plot1 and press F, then press one of the number keys from 1 press [. Move the blinking through 6. Choose the list name with your data. cursor to On and press [. 5. To view any plot, press B (on the top row of buttons) 2. You can make up to six different and the 9 key, or press B and scroll down to option kinds of displays for your data. 9:ZoomStat. Four common ones are described. 6. Notice the picture has no scale. To view details of any plot, Scatterplot press the C key. You can use the arrow keys to move around the picture. Histogram WARNING: From time to time when making plots, you will end Normal probabilit...
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This document was uploaded on 01/28/2014.

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