Posted by Anonymous 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  PsyDAG, Sunday, April 14, 2013 at 2:00pm
90% = mean ± 1.645 SEm
SEm = SD/√n