Question 1101783
Mean: xbar = (∑i=1...10 xi)/10 = (61 + ... + 100)/10 = 84.4
 
Sum Of Squares in X
 
SSX = ∑i (x - xbar)2 = (61 - 84.4)2 + ... + (100 - 84.4)2 = 1364.4
 
Standard deviation
 
Sample:
 
s = √[SSX / (10 - 1)] ≈ 12.3
 
Population:
 
σ = √(SSX / 10) ≈ 11.7
https://www.wyzant.com/resources/answers/207611/the_data_list_shows_the_scores_of_ten_students_in_mr_smith_39_s_math_class