Question

Find the following standard normal probability: p(-1.23 ? z ? +1.23) A. .7814 B. .2186 C....

Find the following standard normal probability: p(-1.23 ? z ? +1.23) A. .7814 B. .2186 C. .8907 D. .1093

Math   Statistics-And-Probability   
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Answer #1

Solution;

Given that,

p ( - 1.23 z   1.23 )

= P( z   -1.23 ) - P ( z   1.23 )

Using standard normal table,

= P ( z   1.23 ) - P( z   -1.23 )

= 0.8907 - 0.1093

= 0.7814

Probability = 0.7814

Option is A. correct.

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