Question

2) Find the mean, median, mode, sample variance and standard deviation of the following statistic students' test scores: 71 74 67 71 64 72 71 65 66 69 (Do all calculations by hand)

Answer 1

Mean is 69 to get the mean you have to add all the numbers up and then count how many numbers there are all together and then divide it by the sum you got. The median is 70 to get the median you have to arrange all the numbers from least to greatest and then see which one is in the middle if there are 2 numbers then add them up and divide by 2 thats what I had to do to get 70. The mode is the most frequent number so the mode would be 71. That's all I can do for you I do not know the others sorry but hope this at least helped!