Find the indicated area under the curve of the standard normal distribution, then convert it to a percentage and fill in the blank.

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Question

Find the indicated area under the curve of the standard normal distribution, then convert it to a percentage and fill in the blank.

About _______ % of the area is between z= - 3 and z = 3 (or within 3 standard deviations of the mean).

math Statistics-And-Probability

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Answer 1

Answer #1

solutoion:

P(-3 < Z <3 )

= P(Z <3 ) - P(Z < -3)

Using z table

= 0.9987 -0.0013

= 0.9974

=99.74% of the area

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Answer 2

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