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13 May, 12:06

A survey conducted by a song rating service finds that the percentages of listeners familiar with poker face by lady gaga who would give the song ratings of 5, 4, 3, 2, and 1 are, respectively, 50 percent, 18 percent, 19 percent, 8 percent, and 5 percent. assign the numerical values 1, 2, 3, 4, and 5 to the (qualitative) ratings 1, 2, 3, 4, and 5 and find an estimate of the probability distribution of x = this song's rating by a randomly selected listener who is familiar with the song.

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  1. 13 May, 12:35
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    The probability distribution is shown in the table below

    The value of the expected mean, E (X), is given by

    E (X) = 5 (0.5) + 4 (0.18) + 3 (0.19) + 2 (0.08) + 1 (0.05) = 4

    Which represents the estimated rating of the song
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