Skillbuilder Applet Exercise demonstrates the law of large numbers and also allows you to see if you have psychic powers. Repeat the simulations at least 50 times, guessing between picking either a red card or a black card from a deck of cards.

a. What proportion of time did you guess correctly?

b. As more and more guesses were made, were your proportions starting to stabilize? If so, at what value? Does this value make sense for the experiment? Why?

c. How might you know if you have ESP?

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% correct 0.75+ 05 0.25 20 40 60 80 100 You guessed red # of guesses Correct! Guess again! red black correct 10 of guesses 19 Restart