## The time it takes 5th graders to complete a particular mathematics problem are Normally distributed with a mean 2 minutes and a standard dev

Question

The time it takes 5th graders to complete a particular mathematics problem are Normally distributed with a mean 2 minutes and a standard deviation of 0.8 minutes.

a. Find the probability that a randomly chosen 5th grader will take more than 2.5 minutes to complete the problem.

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Mathematics
3 days
2021-07-19T16:56:40+00:00
2021-07-19T16:56:40+00:00 1 Answers
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## Answers ( )

Answer0.266Step-by-step explanation:x ~ N(2,0.)

P(x>2.5)

=P(Z>)

=p(z >0.625)

=1-

Φ(0.625)

= 1 – 0.734

=0.266

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