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a_sh-v [17]
4 years ago
14

determine the area under the standard normal curve that lies to the left of (a) z=0.92 (b) z=-1.26 (c) z= -0.64 (d) z= -1.09

Mathematics
1 answer:
enot [183]4 years ago
4 0

Your main choices here are (1) a calculator with statistical functions and (2) a table of z-scores.


(a) On my TI-83 Plus calculator I typed in normcdf(-1000, 0.92). The calculator returned the value 0.821. This is approx. 8/10 of the total area under the std normal curve.


(b) I typed in normcdf(-1000, -1.26) and got 0.104


(c) I typed in normcdf(-1000, -0.64) and got 0.261


(d) I typed in normcdf(-1000, -1.09) and got 0.138


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