95% Confidence Interval

How accurate are you really when you think you're almost certain about something?

For each of the following questions (randomly sampled from our collection), provide a number interval that you are 95% confident includes the correct answer.

Important - not 100% confident, but 95%! Meaning you must leave some room for being wrong.

This doesn't test your intelligence or trivia knowledge - it tests how aware you are of your limitations. The questions are intentionally difficult, obscure facts and figures. You're unlikely to know all of them, or even most of them. Try to give your best estimate and see where your confidence takes you.

To allow you to retake the test and improve your results, the correct answers will not be revealed, only how many you got right. Good luck!

Q1: Full weight (including planes, ammunition, people) of a Nimitz-class aircraft carrier, in millions of pounds

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Q2: Height of tallest man in recorded history, in inches

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Q3: GDP of Mongolia, in billions of USD

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Q4: Total number of passengers flying domestically on U.S. airlines in 2019, in millions

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Q5: Number of passengers who died on the Titanic

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Q6: Population of Russia in 2019, in millions

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Q7: Average distance from Earth to Moon, in miles

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Q8: Number of total worldwide searches processed by Google each day, in millions

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Q9: Number of times the name "Jesus" appears in the King James Bible

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Q10: Market capitalization of Apple on the day Steve Jobs died, in billions of USD

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Q11: Fastest lap time in an F1 car around the Monaco circuit, in minutes (decimal format)

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Q12: Depth of deepest part of Pacific Ocean, in meters

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Q13: Number of regular season goals scored by Wayne Gretzky over his entire NHL career

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Q14: Number of lines of code comprising Windows XP

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Q15: Maximum number of passengers carried on Emirates A380 aircraft (two-class layout)

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Q16: NASA's budget for the year 2019, in billions of USD

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Q17: Amount of coal produced by U.S. mines in 2019, in billions of pounds

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Q18: Distance from Earth to nearest star (excluding Sun), in light-years

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Q19: Number of breeds eligible to compete at the 144th Westminster Kennel Dog Show

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Q20: Number of students from China attending U.S. colleges in the 2018-2019 academic year

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