Emily spent a total of 38.04 on four CDs if each CD cost the same amount what is a reasonable amount for each CD explain why you
2 answers:
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Answer:
Standard deviation of given data = 3.16227
Step-by-step explanation:
<u><em>Step(i)</em></u>:-
Given sample size 'n' = 5
Given data 4, 6,8,10,12
Mean of the sample x⁻ = 8
Standard deviation of the sample
<u><em>Step(ii)</em></u>:-
Given data
x : 4 6 8 10 12
x-x⁻ : 4 - 8 6-8 8-8 10-8 12-8
(x-x⁻) : -4 -2 0 2 4
(x-x⁻)² : 16 4 0 4 16
S.D = √10 = 3.16227
<u><em> Final answer</em></u>:-
The standard deviation = 3.16227
Hello!
The best approximation for the circumference is
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c = 2r
r = 300 ÷ 2
r = 150
c = 2 × 3.14 × 150
c = 942