Hypothesis test for single proportion.
A coin was flipped 60 times and came up heads 38 times.
a. At the 0.10 level of significance, is the coin biased toward heads? Explain your decision rule and calculations.
b. Calculate a p-value and interpret it.
60 -38 = 0.633 Z.10 = 1.281
P (less than or equal to 2.576) = 0.9950
1 - 0.9950 = 0.00499
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Confidence interval - proportion
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99%
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confidence level
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0.633333333
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proportion
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60
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n
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2.576
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z
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0.160
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half-width
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0.794
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upper confidence limit
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0.473
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lower confidence limit
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