In a standard normal dist. what is the prob. of getting a, Ask an Expert

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Normal distributions are extremely important in stats.

In a standard normal dist. what is the prob. of getting a value less than 1.63?
How about between 1.13 and 1.86?
How about greater than .58?

In a normal dist. with mean = 40 and std.dev. = 13, what is the prob. of getting a value less than 45?
How about between 33 and 52?
How about greater than 21?

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