The sittitng heights of 5-year-old boys are descrideb by the randomly variable, X. X~N(61.8, 2.9) cm.

usagirl007A

usagirl007A

Answered question

2021-01-31

The sittitng heights of 5-year-old boys are descrideb by the randomly variable, X.
XN(61.8,2.9) cm.

Answer & Explanation

Cristiano Sears

Cristiano Sears

Skilled2021-02-01Added 96 answers

μ=61.8
σ=2.9
we need to calculate probability for,
P(66<X<68.5)

=P6661.82.9<Xµσ<68.561.82.9

(1.448<Z<2.310)

=P(Z<2.310)P(Z<1.448)=0.98960.9262=0.0633

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