I received a homework assignment back that was wrong and I'm not sure how to do the problem. The teacher is ignoring my questions on it. Can someone help? The question is:
Find the sample size, sample mean, midrange, range, average deviation, sample variance and standard deviation for the following sample data: 60,90,80,70,50. I had 5 for the sample size which was correct, 70 for the Sample mean, 20 for the midrange 40 for the Range 5 for the Average deviation 200 for the sample variance and 14.142 for the sample standard deviation. I got all but the first one wrong. Can anyone show me the proper answer and how to get it? Thanks.