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Dreidl - Hypothesis Testing

A dreidl is a four-sided top that contains a Hebrew letter on each side: nun, gimmel, heh, shin. Curious as to whether or not it is fairly balanced, Dorothy spins her dreidl ten times, observing five gimels and five hehs. Surprised by these results, Dorothy decides to compute the probability that a fair dreidl would produce such aberrant results.

Which of the following probabilities is the most appropriate choice of a significance probability for this investigation?

(a) Five gimmels and five hehs

(b) No nuns or shins

(c) Two letters are absent and two letters are present

(d) At least two letters are absent

And WHY???

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