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Prob 4.50

# Prob 4.50 - 50 Given Rating Poor Below average Average...

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50. Given: Rating Frequency Rel Freq Poor 4 0.08 Below average 8 0.16 Average 11 0.22 Above average 14 0.28 Excellent 13 0.26 50 1.00 Notes: The sample space is the 5 outcomes S = {poor, below average, average, above average, excellent}. A viewer must choose one and only one rating, so the outcomes are mutually exclusive. As a random sample, the viewers are strangers to each other. Moreover, the viewers are probably not allowed to discuss their opinions, but must rate alone on the basis of their own individual opinion. As a result, the viewers ratings are independent of each other. The probability distribution: interpret the relative frequencies as probabilities. For example, because 8% of those sampled gave rating of poor, there is an 8% chance that any person selected at random will give a rating of poor. Rating Prob Cum Prob Poor 0.0800 0.0800 Below average 0.1600 0.2400 Average 0.2200 0.4600 Above average 0.2800 0.7400 Excellent 0.2600 1.0000 sum = 1.0000 Probabilities are assigned using the relative frequency method. (E.g., 4 of

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Prob 4.50 - 50 Given Rating Poor Below average Average...

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