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Author Question: Solve the problem.A study was conducted to determine whether flipping a penny or spinning a penny ... (Read 129 times)

schs14

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on: Jan 18, 2020
Solve the problem.

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%
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Marked as best answer by schs14 on Jan 18, 2020

jaygar71

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Reply #1 on: Jan 18, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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schs14

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Reply 2 on: Jan 18, 2020
Wow, this really help

mammy1697

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Reply 3 on: Yesterday
Excellent

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