Since Wingspan of butterflies 3|2 = 3.2
Wingspan data of butterflies:
3.2, 3.4, 3.4, 3.5, 3.6, 3.6 3.7, 4.1, 4.1, 4.2, 4.3, 4.6, 4.6, 4.7, 4.7.
Count the number of butterflies = 15 Butterflies
Sum of the wingspans of butterflies = 3.2+3.4, 3.4+3.5+3.6+3.6+3.7+4.1+4.1+4.2+4.3+4.6+4.6+4.7+4.7 = 63.9
Mean wingspan is the average wingspan, so Mean wingspan = Sum of wingspan/The number of butterflies
Mean = 63.9/15
= 4.26cm #

Hi the ans is 45.9.

45.9 cm is ridiculously off, considering the maximum data reading is 4.7 cm.

You may wish to check the answer key again, since you may have likely flipped to the wrong section of the answer key. We simply add all the data values up, and then divide by the number of data values, like what the tutor has indicated.

He should be correct, assuming no careless mistake.