A market researcher wants to determine whether a new model of a personal computer that had been advertised on a late-night talk show had achieved more brand-name recognition among people who watched the show regularly than among people who did not. After conducting a survey, it was found that 15% of all people both watched the show regularly and could correctly identify the product. Also, 16% of all people regularly watched the show and 45% of all people could correctly identify the product. Define a pair of random variables as follows:X = 1   if regularly watch the show         X = 0     otherwiseY = 1   if product correctly identified     Y = 0     otherwisea. Find the joint probability distribution of X and Y.b. Find the conditional probability distribution of Y, given X = 1.c. Find and interpret the covariance between X and Y.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 10CYU
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A market researcher wants to determine whether a new model of a personal computer that had been advertised on a late-night talk show had achieved more brand-name recognition among people who watched the show regularly than among people who did not. After conducting a survey, it was found that 15% of all people both watched the show regularly and could correctly identify the product. Also, 16% of all people regularly watched the show and 45% of all people could correctly identify the product. Define a pair of random variables as follows:

X = 1   if regularly watch the show         X = 0     otherwise
Y = 1   if product correctly identified     Y = 0     otherwise

a. Find the joint probability distribution of X and Y.
b. Find the conditional probability distribution of Y, given X = 1.
c. Find and interpret the covariance between X and Y.

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