STA 301 - HW07

# STA 301 - HW07 - STA 301 Applied Statistics Spring 2008...

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STA 301 – Applied Statistics Spring 2008, Section B Homework #7 Due Wednesday, March 12 Question 1 : Suppose Z is a random variable having a standard normal distribution. Calculate the following probabilities: (a) ( 29 65 . 1 Z P (b) ( 29 65 . 1 0 < < Z P (c) ( 29 34 . 1 34 . 1 < - Z P (d) ( 29 75 . 1 25 . 1 < < - Z P (e) ( 29 1 | 5 . 1 < Z Z P

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STA 301-B, Spring 2008 Homework 7 Page 2 of 3 Question 2 As reported in Runner’s World magazine, the times of the finishers in the New York City 10km run are normally distributed with a mean of 61 minutes and a standard deviation of 9 minutes. Let X be the time (in minutes) of a randomly selected finisher. Find: (a) ( 29 75 X P (b) ( 29 70 50 < X X P U (c) the 60 th percentile running time Question 3 Desert Samaritan Hospital, in Mesa, Arizona, keeps records of emergency room traffic. Those records reveal that the times between arriving patients have a mean of 8.7 minutes with a standard deviation of 8.7 minutes. One patient has just arrived at the emergency room, and you wish to estimate the
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## This homework help was uploaded on 04/17/2008 for the course STA 301 taught by Professor Noe during the Spring '08 term at Miami University.

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STA 301 - HW07 - STA 301 Applied Statistics Spring 2008...

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