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[answered] A city has 1,180,307 residents. A recent census showed that


A city has 1,180,307 residents. A recent census showed that 354,227 of these residents regularly use the city's public transportation system. A survey is being conducted in which 1,164 of the city's 1,180,307 residents will be randomly selected.

This question relates to the?proportion?of the survey that is made up of people that do use the city's public transport.

The proportion of people in the survey that do use public transport approximately follows a normal distribution. Calculate the standard deviation of this distribution. Give your answer to 4 decimal places.

Standard deviation =?


Jason "Sharp Shooter" Averson is a basketball player in the major league. He has a free throw success rate of 0.61.

Find the probability that from a random sample of 25 free throws, Jason is successful, i.e. scores, on 17 or more throws.

You may find this?standard normal table?useful. Give your answer as a decimal to 3 decimal places.

Probability =?




Question-1:

 

Given that: N 1180307 and x 354227; n 1164

 

p 1 p

 

n

 

354227 354227 1 1180307 1180307 1164

 

0.300114 0.699886 1164

 

0.210046 1164 0.00018 Variance 2p Standard deviation p? Variance 0.00018...

 


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