3. The time taken by the postman to deliver to the school is normally distributed with a mean of 12 minutes and a standard deviation of 2 minutes He delivers the posts every day. Calculate the z-score and estimate the number of days during a full year (365 days) when it takes him; a) Less than 17 minutes (b.) less than ten minutes (c.) between 9 and 13 minutes.

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3. The time taken by the postman to deliver to the school is normally distributed with a mean of 12 minutes
and a standard deviation of 2 minutes. He delivers the posts every day. Calculate the z-score and
estimate the number of days during a full year (365 days) when it takes him;
a) Less than 17 minutes
(b.) less than ten minutes
(c.) between 9 and 13 minutes.
Transcribed Image Text:3. The time taken by the postman to deliver to the school is normally distributed with a mean of 12 minutes and a standard deviation of 2 minutes. He delivers the posts every day. Calculate the z-score and estimate the number of days during a full year (365 days) when it takes him; a) Less than 17 minutes (b.) less than ten minutes (c.) between 9 and 13 minutes.
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