Assume that the background noise X of a digital signal has a normal distribution with =

Question:

Assume that the background noise X of a digital signal has a normal with μ = 0 volts and σ = 0.5 volt. If we observe n = 100 independent measurements of this noise, what is the probability that at least 7 of them exceed 0.98 in absolute value?
(a) Use the Poisson to approximate this probability.
(b) Use the normal to approximate this probability.
(c) Use the binomial to approximate this probability
Distribution
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