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The numbers of faculty at 20 randomly selected state-controlled colleges and universities with enrollment under 12,000 students are shown below. Use these data to estimate the mean number of faculty at all state-controlled colleges and universities with enrollment under 12,000 with 98% confidence. Assume σ-165.1. Round intermediate and final answers to one decimal place. Assume the population is normally distributed. 374 412 134 539 471 211 384 396 224 337 395 121 356 621 367 408 515 280 289 180 Source: World Almanac.

math   Statistics-And-Probability   
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