1. Suppose you flip a coin 314 times, and heads appears 159 times. (a) Construct an approximate 90% confidence interval for the probability that the coin comes up heads. (b) Approximately how many samples would you need to obtain an approximate 90% confidence interval with width 0.02, while keeping exactly 50.64% of flips appearing heads? (c) You give the coin to a friend, who also flips the coin 314 times, and obtains an approximate confidence interval [0.390, 0.500] instead. What confidence level did (s)he use?

1. Suppose you flip a coin 314 times, and heads appears 159 times. (a) Construct an approximate 90% confidence interval for the probability that the coin comes up heads. (b) Approximately how many samples would you need to obtain an approximate 90% confidence interval with width 0.02, while keeping exactly 50.64% of flips appearing heads? (c) You give the coin to a friend, who also flips the coin 314 times, and obtains an approximate confidence interval [0.390, 0.500] instead. What confidence level did (s)he use?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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