Question 197759This question is from textbook Applied Stats in Business and Eco 1e
: After reading over the information and using the Internet information I still can't understand how to arrive at this answer. If you would please, please help me, I will be truly grateful to you.
A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations. (b) Calculate "a" value and interpret it. Thanks again.
This question is from textbook Applied Stats in Business and Eco 1e
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations. (b) Calculate "a" value and interpret it.
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Ho: p = 1/2
Ha: p > 1/2
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p-hat = 38/60 = 0.63
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Test Statistic: z(0.63-0.50)/sqrt[0.5*0.5/60] = 2.066
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p-value: P(z > 2.066) = 0.0194
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Conclusion: Since the p-value is less than 10%, reject
Ho. The test does not provide evidence that the coin
is fair toward heads.
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Comment: Let me know if you do not understand this
presentation.
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Cheers,
Stan H.
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