Happy School System wants to estimate the work involved in completely switching

to paperless grade reports. The school system randomly selected 425 families and

logged the number of paper grade reports sent during the last school year. They

found a 95% confidence interval of (6.2-8.8) for the mean number of grade reports

sent to each family last school year.

Which statement is a valid conclusion based on the information given?

404 out of the 425 families will have received greater than 6.2 grade reports last

year.

There is a 95% chance that the mean number of grade reports sent to each

family last year ranges from 6.2 to 8.8.

There is a 95% chance that the mean number of grade reports sent to each

family last year was greater than 8.8 grade reports.

The Margin of Error for the data is +/-2.6