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Q1. Assume X ~N(10,4) i) Calculate the probability P(9 < X <12). Include a carefully labeled...

Q1. Assume X ~N(10,4)

i) Calculate the probability P(9 < X <12). Include a carefully labeled diagram

ii) Derive the 2 values of X (symmetric around the mean) that contain approximately 80% of the distribution. Draw a carefully labelled diagram.

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