If I understood your problem, you want to calculate the sum of the squared deviations from the sample. If so the formula of the St. Deviation is:
₋
s =√[Σ(xi - x)²/(n-1)], with n = sample size
₋
s² =Σ(xi - x)²/(n-1)
4² = Σ(xi - x)²/(20-1) = Σ(xi - x)²/(20-1)
16 = Σ(xi - x)²/(19)
and Σ(xi - x)² = (16).(19) = 304
Answer:
See below
Step-by-step explanation:
If you notice a pattern, 15*3/5=9, 9*3/5=27/5, and 27/5*3/5=81/25. So this is an infinite geometric series.
So the common ratio is 3/5 where the first term is 15 and n=1, so the summation notation would be
To find the sum of an infinite geometric series, we use the formula S(n)=a1/1-r where r is the common ratio:
S(n)=15/1-3/5
S(n)=15/2/5
S(n)=75/2
So the sum of the infinite geometric series is therefore 75/2 or 37.5
Hope this helped!
Answer:
For every x feet of rope purchased, the total cost(y) increases by $6.85.
Step-by-step explanation:
Sales tax rate differentials can induce consumers to shop across borders or buy products online. ... California has the highest state-level sales tax rate, at 7.25 percent. .... Nevada, 6.85%, 8, 1.13%, 7.98%, 13, 1.30% .... Local Income Taxes: City- and County-Level Income and Wage Taxes Continue to Wane