Steps to create Bins: 1. Calculate the bin width Bin width = (max-min)/ # of bins Adjust the max, Rule of thumb: MinMax values can be the Rule of thumb: Start with 5 to10 bins. min, & # of bins to bserved possible, or just pretty Look at the graph and refine your bins. get a pretty ambers inbetween the possible & (There isn't a unique or "perfect" number. served values but make sure you solution..usualy between 5-20 bins). Include all the observations! 2. Create Bins Bin Bin Lower Limit Bin Upper Limit Mutually Exclusive: (do 1") (do 2") Frequency No Overlap. Min MUTUALLY Each observation can + bin width EXCLUSIVE only fall in ONE class! 2 (ex: 30-39, 40.49 and + bin width Max not 30-40, 40-50) 3. Put the Data into the Bins Your turn! We want to study the effect that sleep has on test performance. The survey asked the student to report the amount of hours that they slept the night before a final exam. Construct the frequency table (use 4 bins). Show your bin width calculation! A Hours of Sleep Hours of Sleep %cf 8 Bin f of of %cf 3 10 4 5 5 6 7 10 12 10 10 11 Question: What percentage of students slept for less than 10 hours? 12 15 13 A Question: What percentage of students slept for less than or equal to 12 hours? 14 11 Question: What percentage of students slept for more than 6 hours? 15 16