An aritmetic sequcne is represented as

where
an=nth term
a1=first term
d=common differnce, or how much each term increases by
n=which term
example
1,3,5, etc
first term is 1
common difference is 2 because it increases by 2 each time
so the formula would be

if we had
5,3,1
first term s 5
common difference is -2 since it goes up by -2 each time
so formula is

hope this helps
Answer:

Step-by-step explanation:

Strike with 4th table

Answer:
upper control limit = 13.34
Step-by-step explanation:
The c-chart is used to check the change in the number of recorded calls per day
First find out the center line
c = sum of recorded calls/number of days
c = (3 + 0 + 8 + 9 + 6 + 7 + 4 + 9 + 8)/9
c = 54/9
c = 6
The upper control limit for 3σ is
upper control limit = c + 3√c
upper control limit = 6 + 3√6
upper control limit = 13.34
Therefore, the upper control limit for the 3-sigma c-chart is 13.34.
Answer
=12/13
Step-by-step explanation:
I have done it before:)
Answer:
I think its C but I'm not too sure.