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Spinning a coin, unlike tossing it, may not give heads and tails equal probabilities. I spun a penny 150 times and got 65 heads. We wish to find how significant is this evidence against equal probabilities.
a. What is the sample proportion of heads? Round to 3 places.
b. Heads do not make up half of the sample. Is this sample evidence that the probabilities of heads and tails are different?
Take p to be the probability of getting heads in a spin of a penny. Which hypotheses do we want to test?
c. Compute the z test statistic.
z =
Round to 2 places.
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