document.write( "Question 560246: 1. In the table below, the random variable x represents the number of cups or cans of caffeinated beverages consumed by Americans each day based on data from the National Sleep Foundation. \r \n" );
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document.write( "X P(x) \n" );
document.write( "0 0.22 \n" );
document.write( "1 0.16 \n" );
document.write( "2 0.21 \n" );
document.write( "3 0.16\r \n" );
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document.write( " Determine whether or not a probability distribution is given. \n" );
document.write( "a. If a probability distribution is given, find its mean and standard deviation. \n" );
document.write( "b. If a probability distribution is not given, identify the requirements that are not satisfied. \r \n" );
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document.write( "2. The final exam in a sociology course consists of 100 multiple-choice questions. Each question has five possible answers, and only one of them is correct. An unprepared student makes random guesses for all of the answers. \r \n" );
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document.write( "Find the mean and standard deviation for the number of correct answers for such students. \n" );
document.write( "3. Mars, Inc. claims that 24% of its M&M plain candies are blue. A sample of 100 M&Ms is randomly selected. \r \n" );
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document.write( "Find the mean and standard deviation for the number of blue M&Ms in such groups of 100.\r \n" );
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