The county clerk wants to estimate the proportion of voters who ...

[darbym82]

The county clerk wants to estimate the proportion of voters who will need special election facilities. Suppose a sample of 400 voters was taken. If 150 need special election facilities, calculate a 90 confidence interval for the population proportion.
 
  What will be an ideal response?

Question 2

The interval between patients arriving at an outpatient clinic follows an exponential distribution at a rate of 1 patient per hour. What is the probability of that randomly chosen arrival interval will be more than 1 hour?
 
  What will be an ideal response?

[amy.lauersdorf90]

Answer to Question 1

0.3352 to 0.4148

Answer to Question 2

0.3679