Question 14 Select the correct statement: O A Cl for a mean is always a T-Interval O A Cl for a proportion is always a Z-Interval O A CI for a mean is always a Z-Interval A CI for a proportion is always a T-Interval0 Question 15 ' After the most recent poll, a newspaper reports that a politician has 31% of the vote, with a 7% margin of error. Select the correct statement: '33:? As a Cl, the results state that 0.24 After the most recent survey, a 95% CI for the proportion of a population that is infected with a virus is: 0.19 c: p <: a recent report claimed that the infection rate is select correct statement: since not right in middle of ci appears to be invalid falls within valid cl does fall>