Answer:
Standard deviation(S.D) = √{Mean difference(D²) - Mean(M)}
S.D.= 16.6
Step-by-step explanation: A) M =33.2
∴ S.D = √D² - 33.2
16.66 = √D² - 33.2
D² = 16.66² + 33.2 = 277.56 - 33.2 = 244.36
∴D = √244.36 = 15.6
B) M= 49.9
∴ S.D.=√D² + 49.9
16.6 =√D² + 49.9
D² = 16.6² + 49.9 = 277.56 + 49.9 = 327.46
∴ D = √327.46 = 18.1
C) M = 102.8
∴ S.D. =√D² + 102.8
16.66 =√D² + 102.8
D² = 16.66² + 102.8 = 277.56 + 102.8 = 380.36
∴ D =√380.36 = 19.5
D) M = 154.2
∴ S.D. = √D² + 154.2
16.66 =√D² + 154.2
D² = 16.66² + 154.2 =277.56 + 154.2 = 431.76
D =√431.76 = 20.8
There isn't a graph so i cant really answer
B. 1/y=5x^2+10
C. –y = 5x2 + 10
D. y= 1/5x^2+1/10
Answer:
I agree, it's also A.