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)

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!

option a.

step-by-step explanation:

if you look closely at the graph, we can notice that the function is not defined at two different points.

if you look at functions b and c, you will notice that both functions are not defined at just one point. the function b is not defined at x= -5/2 and function c is not defined at x=-5. both options are discarded, given that our function should not be defined at two fiferent points.

now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.

7/2

(decimal: 3.5)

welcome ; )

step-by-step explanation: