Texas Instruments TI-30XIIS Teachers Guide - Page 22
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What's My Score? - 1-Variable Statistics (Continued) 2. Now find the average of your friend's scores. Remember to put 2 as the frequency for 89 and 1 for all others. 3. Who won? Your friend: 93 (You had 92.6.) Extension Present the following problem to students: Your friend took a test on the day you were absent and scored 95. What score do you need to get so that you are the winner? The score you need: 98 Note: Make sure you exit the STAT mode before going on to another problem. ³ 1. Press % t " " < to select CLRDATA. 2. Press v and enter the friend's first score. X1 = 89 3. Continue entering the friend's scores and frequencies, following steps 3 and 4 on the previous page. 4. When finished, press u " to select v, the average. Write it down. n v Sx sx 93.0 ³ 1. Press % t and " " to CLRDATA. Press