1) Find the area under the normal curve to the left of z=-2 plus the area under the normal curve to the right of z=2.
2) Find the area under the normal curve to the left of z= -2 plus the area under the normal curve to the right of z=2.
3) Find the z-scores that separate the middle 69% of the distribution from the area in the tails of the standard normal distribution.
4) Assume that the random variable X is normally distributed, μ=42 and standard deviation σ=7.
5) Assume the random variable X is normally distributed, with mean μ=41 and standard deviation =9 Find the 10th percentile.