A sample of size n taken from a population with mean = µ and standard deviation = σ has sample mean = µ and sample s.d. = σ/√n.
If the final exam scores are normally distributed, and X is a random variable for the mean of a sample, then
Pr[X < 70] = Pr[(X - 73) / (7.8/√24) < (70 - 73) / (7.8/√24)]
… ≈ Pr[Z < -1.8842]
… ≈ 0.0298
(where Z is normally distributed with µ = 0 and σ = 1).
Oar City because 45/9 = 5 and 27/3 = 9, 5 < 9.
If this is correct please give me Brainliest, thank you!
It’s 2 because it’s crossing over the x line and has 2 lines before it
Answer:
The probability is "0.6406", this elevator isn't appear to be safe
Step-by-step explanation:
The given values are:
Mean,
Standard deviation,
Number of male passengers,
Now,
⇒ 
hence,
The probability will be:
= 
= 
= 
A)alternate to X is angle b
b)corresponding to X is angle d
