I tried converting them into histogram and then into a bell curve, but couldn't get it to work, because I don't understand terms such as "bin range". Can someone enlighten me on whether I need to convert the data into a histogram first then into a separate bell curve? If so, could someone show me how I should do it? Many thanks

PS - I understand that the graph I am looking for should be a normal distribution (I'm guessing it's not a standard normal distribution graph as the graph I am looking for is not one with 0 in the middle). Please kindly advise me... Thank you very much!