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The length of a text messaging conversation is normally distributed with a mean of 2 minutes and a standard deviation of 0.5 minutes. What is the probability that a conversation lasts longer than 3 minutes?
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Oct 18, 2018
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The length of a text messaging conversation is normally distributed with a mean of 2 minutes and a standard deviation of 0.5 minutes. What is the probability that a conversation lasts longer than 3 minutes?
Mathematics
high-school
Joaquim Oliveira
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On virtual school, the answer is 0.02275
Tang
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Oct 18, 2018
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Tang
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okay.consider A as the length of a text message conversation.
p(a>3)=1-p(b<3-2)/0.5)=1-0.97725= 0.02275.
hope i help.
good luck!
Somesh Kumar
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Oct 23, 2018
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Somesh Kumar
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