In a sample of 225 college seniors, 182 responded positively when asked if they have spring fever. Based upon this, compute a 90% confidence interval for the proportion of all college seniors who have spring fever. Then find the lower limit and upper limit of the 90%  confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places. Lower limit:   Upper limit:

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In a sample of 225 college seniors, 182 responded positively when asked if they have spring fever. Based upon this, compute a 90% confidence interval for the proportion of all college seniors who have spring fever. Then find the lower limit and upper limit of the 90%
 confidence interval.

Carry your intermediate computations to at least three decimal places. Round your answers to two decimal places.

Lower limit:
 
Upper limit:
 
 
 
 
Expert Solution
Step 1

It is given that, in a sample of 225 college seniors, 182 responded positively when asked if they have spring fever. 

x=182

n=225

() = x/n= 182/225 = 0.809

The 90% confidence interval can be calculated as:

CI=p^±Zα/2p^1-p^n

 

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