Confidence Interval Game 
For each question below, write down a low guess and a high guess so that you are 90% sure the real answer falls within your range.

👉 Example: Question: How tall is the Eiffel Tower (in feet)?

Low guess: 500 ft

High guess: 1,200 ft

(The true height is 1,083 ft, so this interval captures the right answer.)
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According to Dyson, how many prototypes did James Dyson make of his vacuum?

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How many confirmed kills did the Red Baron have before he was shot down in 1918?

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According to Wikipedia how wide is the illumination radius for the moon light towers in Austin?

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What is the world record for how long someone has held their breath?

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Six Flags over Arlington opened in 1961. It's first season lasted 45 days. How many visitors did it receive in that time?

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What year was the LEGO company founded? *
How many official national parks are in the United States? *
According to the Bullock Museum, how long ago did humans first settle in what is now known as Texas? *
As of September 15, 2025, how many total wins do the Dallas Cowboys have in their history?

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According to the NY Times, how many shares traded on the Black Monday crash of 1987?
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