measures of location and spread key information

Question 1

lower quartile

Answer 1

divide N by 4, if the number is a whole number than the lower quartile is the midpoint of that number and the one above. If it is not a whole number round up and pick that data point

Question 2

upper quartile

Answer 2

find 3/4 of N. if it is a whole number that find the midpoint between that number and the one above. if it is not a whole number that round up and pick that data point