Posted by Jim on Saturday, February 2, 2013 at 3:20pm.
A random sample of 42 college graduates revealed that they worked an average of 5.5 years on the job before being promoted. The sample standard deviation was 1.1 years. Using the .99 degree of confidence, what is the confidence interval for the population mean?

Math  PsyDAG, Sunday, February 3, 2013 at 5:13pm
99% = mean ± 2.54SD = ?

Math  anessa, Thursday, July 10, 2014 at 4:59pm
5.06 and 5.94
Answer This Question
Related Questions
 math  a random sample of 42 college graduates who worked during their program ...
 math  The National Center for Education surveyed 4400 college graduates about ...
 statistics  The National Center for Education surveyed 4400 college graduates ...
 statistics  Use the given confidence level and sample data to find a confidence...
 business statistics  1. The average life expectancy of people around the world ...
 Estimating Using Confidence Intervals  An investor wants to determine the true ...
 STAT  1. In a study of the income of U.S. factory workers, a random sample of ...
 probs & stats  1. A study of 40 people found that they could do on the ...
 Statistics  1. A study of 40 people found that they could do on the average15 ...
 Statistics  A random sample of 14 college female students revealed their ...
More Related Questions