Unformatted text preview: number is √ 2500 × . 5 = 25. The SE of the percentage is 25 2500 × 100% = 1% . (c) Compute a 95% conﬁdence interval for the percentage of homes that watch America idol. [ 4 points] [You may assume that the normal curve can be used] Solution 29 . 7% ± 2 × 1% = 29 . 7% ± 2%, which is 27.7% to 31.7%. (d) If the number of households with TV sets is 100 million, then roughly how many households in the US watch America Idol ? [ 2 points] Solution 29.7% of 100 million is 29.7 million. 1...
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 Spring '11
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 Math, Statistics, Normal Distribution, American Idol, Taylor Hicks, watch America Idol

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