Answer:
μ = 235.38
σ = 234.54
Step-by-step explanation:
Assuming the table is as follows:
This is an example of grouped data, where a range of values is given rather than a single data point. First, find the total frequency.
n = 339 + 86 + 55 + 18 + 11 + 8 + 3
n = 520
The mean is the expected value using the midpoints of each range.
μ = (339×100 + 86×300 + 55×500 + 18×700 + 11×900 + 8×1100 + 3×1300) / 520
μ = 122400 / 520
μ = 235.38
The variance is:
σ² = [(339×100² + 86×300² + 55×500² + 18×700² + 11×900² + 8×1100² + 3×1300²) − (520×235.38²)] / (520 − 1)
σ² = 55009.7
The standard deviation is:
σ = 234.54
would the answers be 0.5? i'm not sure but i tried. have a great day.
cuz half (x2) of a number (x) is (=) one..
2x=1
0.5=x
0.5x2=1
Answer:
D
Step-by-step explanation:
The m=3/4 when graph
Answer:
I think it's -7x? not sure though
Step-by-step explanation:
(x-9)(x+2)=x^2______-18
x^2+2x-9x-18=x^2____-18
x^2-7x-18=x^2____-18
That's what I got don't quote me on it though. Sorry if I couldn't help much