n=25μ=4σ2=16σ=4P(X>x)=0.9798P(X≤x)=1−0.9798=0.0202P(Z≤x−44/25)=0.0202x−44/5=−2.049x−4=−1.64x=4−1.64=2.36n=25 \\ \mu=4 \\ \sigma^2 = 16 \\ \sigma=4 \\ P(X>x) = 0.9798 \\ P(X≤x) = 1 -0.9798 = 0.0202 \\ P(Z≤ \frac{x- 4 }{4 / \sqrt{25}}) = 0.0202 \\ \frac{x- 4 }{4 / 5} = -2.049 \\ x -4= -1.64 \\ x = 4-1.64=2.36n=25μ=4σ2=16σ=4P(X>x)=0.9798P(X≤x)=1−0.9798=0.0202P(Z≤4/25x−4)=0.02024/5x−4=−2.049x−4=−1.64x=4−1.64=2.36
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