Elementary Statistics

12th Edition

ISBN: 9780321837936

Author: Mario F. Triola

Publisher: PEARSON

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Textbook Question

Chapter 4.2, Problem 29BSC

In Exercises 25–32, find the probability and answer the questions.

28. Guessing Birthdays On their first date, Kelly asks Mike to guess the date of her birth, not including die year.

a. What is the probability that Mike will guess correctly? (Ignore leap years.)

b. Would it be unlikely for him to guess correctly on his first try?

c. If you were Kelly, and Mike did guess correctly on his first try, would you believe his claim that he made a lucky guess, or would you be convinced that he already knew when you were born?

d. If Kelly asks Mike to guess her age, and Mike’s guess is too high by 15 years, what is the probability that Mike and Kelly will have a second date?

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Chapter 4.2, Problem 28BSC

Chapter 4.2, Problem 30BSC

Chapter 4 Solutions

Elementary Statistics

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Solution Summary: The author explains that the probability that Mike correctly guesses the date of birth of Kelly is 0.0027, which is less than 0.05.

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Chapter 4 Solutions