so w/ the normal distribution, to find the area between 2 numbers, say [tex] P(a \leq Z \leq b), [/tex], I need to split this up into 2:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]P(-\infty < z \leq b) - P(-\infty < z < a). [/tex]

my question is, why is it not [tex]P(a < z < +\infty) [/tex]?

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# Question bout normal distribution:

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