4+4 =8
8-1=7
hopfully it helps
The standard deviation is 1.98. Option A is correct.
The standard deviation formula is given as
where:
- SS is the sum of squares = 200
- n is the sample size = 51
Substitute the given parameters into the formula to have:

Hence the standard deviation is 1.98
Learn more on standard deviation here: brainly.com/question/12402189
It shows the distance between him and the coach getting the “motion” of his running time. It’s like the circle with the line in the middle...
Answer:
a) 17
b) 21st term
Step-by-step explanation:
a) 20 - 3 = 17
b) 20 - 21 = -1