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4 . The following is a list of the lengths, in seconds, of some of Shakira's songs from studio albums. The data: 231 219 213

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4 . The following is a list of the lengths, in seconds, of some of Shakira's songs from studio albums. The data: 231 219 213 249 262 255 233 187 239 288 240 190 192 211 224 145 287 195 a) Find an 80% confidence interval estimate of the mean length of Shakira songs. b ) What is the margin of error? C) Express the interval in the form x + E

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