jellyblubbers

Names:____________________________________________________________ 1. Look at the Jellyblubbers colony. Pick out 10 Jellyblubbers that you think are a good representation of the entire population. Using the extra sheet, record the lengths of each of the Jellyblubbers that you picked in the table below. Jellyblubber Number Length Jellyblubber Number Length 22 5 mm 44 15 mm 17 5 mm 88 27 mm 64 8 mm 89 30 mm 68 13 mm 41 41 mm 39 15 mm 28 49 mm 2. What is the average length of the 10 Jellyblubbers from your sample above? 20.8 mm 3. In a few sentences, explain how you chose your Jellyblubbers. Would you consider this a simple random sample? Why or why not? I chose the Jellybubbers to represent the population based on their size. I used an eye test to try to group the jelly blubbers from smallest to largest. I wouldn’t consider this to be a random sample because I influenced the decision of which jelly blubber was chosen. 4. If you are doing this remotely, please use the attached Excel document or Google Sheet to randomly select 10 Jellyblubbers. If you are in class, Prof H will explain how to do this step. Jellyblubber Number Length Jellyblubber Number Length 88 27 mm 10 10 mm 39 15 mm 23 32 mm 32 20 mm 3 9 mm 79 17 mm 8 40 mm 33 43 mm 93 10 mm 5. What is the average length of the 10 Jellyblubbers from your sample above? 22.3 mm 6. Would you consider this a simple random sample? Why or why not?