Answer:
D
Step-by-step explanation:
answers B and D are both true but box plots compare medians more often than means
Answer:
Variance of difference between pre-exam and post-exam grades = 10.8
Step-by-step explanation:
Correlation (X,Y) = Covariance (X,Y) / √ { Variance (X) . Variance (Y) }
Given : Correlation (Pre & post exam grade) = 0.9 ; Variance (Pre exam grade) = 0.90 ; Variance (Post exam grade) = 16
So, 0.9 = Covariance (X,Y) / √ { 16 x 9 }
0.9 = Covariance (X,Y) / 12
Covariance (X,Y) = 12 x 0.9 = 10.8
Answer:
to find the answer we have add all the numbers given then divide by number of items
Step-by-step explanation:
26+28+29+30+37= 150
as there are 5 numbers we divide 150/5=30
there for the arithmetic mean for the other numbers is 30
hope you understood
Answer:
343
Step-by-step explanation:
84/12=7
7^3=343