{"id":"dat-col-club-show-up-rate-plan","audience":"college","category":"data","technique":"context","title":"Use past show-up rates to plan food for a club event","free":false,"task":"You're ordering food for the next club event, which has 150 RSVPs. Event 3 moved online at the last minute, so leave it out. Write exactly 3 numbered lines, one per remaining event, each as Event: checked in ÷ RSVPs = X%, then one unnumbered last line: Plan for: average % x 150 = N people. Plain text, under 60 words.","materialLabel":"Event check-in data (attached to your prompt automatically)","material":"PRE-LAW SOCIETY - fall events (RSVPs from the club app, check-ins at the door)\n\nEvent | RSVPs | Checked in\n1. Welcome mixer (Sept 10) | 120 | 90\n2. Resume workshop (Sept 24) | 60 | 30\n3. Alumni panel (Oct 8) | 80 | 20\n4. Game night (Oct 22) | 60 | 51\n\nNotes:\n- Event 3: the room flooded, so we switched to Zoom an hour before. Most people didn't see the email.\n- Next event: Mock trial watch party, Nov 19, 150 RSVPs so far.\n- Pizza from Gino's: one large feeds about 3 people.\n- Budget from student activities: $400 for food.\n- Treasurer says \"people always flake, plan for half.\" That's a guess.\n- Sign-in sheet at the door is now a QR code.","rules":[{"type":"numberedItems","count":3},{"type":"plainText"},{"type":"maxWords","max":60}],"mistakes":[{"title":"Including the Zoom event","why":"The AI averages in event 3's 25% and under-orders food.","fix":"Add: \"Leave out event 3; it moved online.\"","checks":["r0","r1"]},{"title":"Using a guess","why":"The AI goes with the treasurer's 'plan for half.'","fix":"Add: \"Use the average show-up rate from the data.\"","checks":["r2"]},{"title":"Not asking to see the work","why":"You'll want to check before spending the budget.","fix":"Add a line to copy: \"1. Mixer: 90 ÷ 120 = 75%\"","checks":["numberedItems","r0"]},{"title":"Trusting the AI to count words","why":"AI is bad at counting. Ask for a total word limit and it often lands over it.","fix":"Cap each line: \"each line under 10 words.\"","checks":["maxWords"]},{"title":"Forgetting where it goes","why":"AI loves markdown tables and bold, which show up as clutter in the club's group chat.","fix":"Add: \"Plain text, no bold, headings or tables.\"","checks":["plainText"]}],"promptHints":[{"label":"Leaves out event 3","patterns":["event 3","online|zoom","leave out|exclude|drop"]},{"label":"Asks for a headcount","patterns":["150","plan for","how many"]},{"label":"Asks to show the math","patterns":["show (the |your )?(math|work)","x \\$|\\bx\\b.{0,10}=","calculation","step"]},{"label":"Sets a word limit","patterns":["\\d+\\s*words","word (limit|count)","under \\d+"]},{"label":"Asks for plain text","patterns":["plain","no bold","no markdown","no formatting","no (headings|tables)"]}],"hint":"One event isn't like the others. Tell the AI to drop it and to use the average to plan for 150 RSVPs.","rubricLabels":["Event 3 is left out; the rates are 90 ÷ 120 = 75%, 30 ÷ 60 = 50% and 51 ÷ 60 = 85%","The average is (75 + 50 + 85) ÷ 3 = 70%","The last line gives Plan for: 70% x 150 = 105 people, with nothing before the first numbered line"]}