Answer:
8
Step-by-step explanation:
Photo has the work you need
The expected completion time is μ = 40 weeks.
The random variable, X = 38 weeks (the probable time)
If the standard deviation is σ, then the z-score is z = (x - μ)/σ.
Let us test the given standard deviations.
When σ=1,
z = (38-40)/1 = -2
From standard tables,
P(x<=38) = P(z<=-2) = 0.0228 =2.3%
When σ=2,
z = (38*40)/2 = -1
P(x<=38) = P(z<=-1) = 0.1587 = 15.9%
When σ=4,
z = (38-40)/4 = -0.5
P(x<=38) = P(z<=-0.5) = 0.3085 = 30.9%
Answers:
z=1 => 2.3%
z=2 => 16% (approx)
z=4 => 31% (approx)
Answer:
5/7
Step-by-step explanation:
3-1 2/7
3=21/7 (by multiplying denominator)
1 2/7=16/7 (by multiply 1 and 7. Then add to 2)
21/7 - 16/7 = 5/7
Answer:
1. -1,1 -2,2 -3,3. 2. when we are digging and when we are planting something. 3. Zero is the center point in the negitives, It tells you when you are about to hit negitives or positives.
Step-by-step explanation:
