Question: Find the z-value such that for a normal distribution the interval from z to + z contains (a) 50%, (b) 90%, (c)

Find the z-value such that for a normal distribution the interval from μ − zσ to μ + zσ contains

(a) 50%,

(b) 90%,

(c) 95%,

(d) 99% of the probability.

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