A random sample of 415 children from England and the United States who completed a survey in

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A random sample of 415 children from England and the United States who completed a survey in a recent year was selected. Each student’s country of origin was recorded along with which superpower they would most like to have: the ability to fly, ability to freeze time, invisibility, superstrength, or telepathy (ability to read minds). The data are summarized in the two-way table.

Country Superpower England U.S. Total Fly 54 45 99 Freeze time 52 44 96 Invisibility 30 37 67 Superstrength 20 23 43 Telepathy 44 66 110 Total 200 215 415


Suppose we randomly select one of these students. Define events E: England, T: telepathy, and S: superstrength.

a. Find P(T | E). Interpret this value in context.

b. Given that the student did not choose superstrength, what’s the probability that this child is from England? Write your answer as a probability statement using correct symbols for the events.

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Related Book For  book-img-for-question

The Practice Of Statistics

ISBN: 9781319113339

6th Edition

Authors: Daren S. Starnes, Josh Tabor

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