Determine P(-k≤X≤k) when X follows the standard normal distribution Statistics & Probabilities

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Course : Probability distributions
Exercise : Determine the expected value for a game of chance
Exercise : Identify situations that fit the binomial distribution model
Exercise : Determine P(X=k) for a certain k and for X following a given binomial distribution, using the formula
Exercise : Determine P(a≤X≤b) when X follows any normal distribution and a and b are given
Exercise : Determine a such that P(-a≤X≤a)=b, when X follows the standard normal distribution and b is given