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Posted by on Sunday, April 14, 2013 at 12:20pm.

construct a 90 confidence interval for the population mean ÃŽ¼. assume the population has a normal distribution. A sample if 15 randomly selected math majors has a grade point average of 2.86 with a standard deviation od 0.78. Round to the nearest hundredth

  • statstics - , Sunday, April 14, 2013 at 2:00pm

    90% = mean ± 1.645 SEm

    SEm = SD/√n

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