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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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Ingy_ Ingy_
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4 years ago
A study was conducted to determine whether flipping a penny or spinning a penny has an effect on the proportion of heads. Among 56,126 trials, 25,586 involved flipping pennies, and 12,630 of those pennies turned up heads. The other 30,540 trials involved spinning pennies, and 12,815 of those pennies turned up heads.
(i) What percentage of the trials involved flipping pennies?
(ii) What percentage of the trials involved spinning pennies?
(iii) Among the pennies that were flipped, what is the percentage that turned up heads?
(iv) Among the pennies that were spun, what is the percentage that turned up heads?
Round your answers to the nearest percent.

▸ (i) 46%; (ii) 54%; (iii) 49%; (iv) 42%

▸ (i) 46%; (ii) 54%; (iii) 50%; (iv) 41%

▸ (i) 46%; (ii) 54%; (iii) 170%; (iv) 142%

▸ (i) 54%; (ii) 46%; (iii) 49%; (iv) 42%
Textbook 
Statistical Reasoning for Everyday Life

Statistical Reasoning for Everyday Life


Edition: 5th
Authors:
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rinderbikrinderbik
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4 years ago
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Ingy_ Author
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4 years ago
Good timing, thanks!
cartoon
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Yesterday
You make an excellent tutor!
jodie1
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2 hours ago
Just got PERFECT on my quiz
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