Scores on an aptitude test are normally distributed with a mean of 220 and a standard deviation of 24. Determine the percentage of samples of size 16 that have a mean score within 9 points of the population mean score of 220. Find the indicated probability or percentage for the sampling error.
Answer: 86.64%
HOW do I get this answer?!? I know some of the steps, but for some reason I just cannot solve it!!!
Thank you!
Answer: 86.64%
HOW do I get this answer?!? I know some of the steps, but for some reason I just cannot solve it!!!
Thank you!