Chapter 14.3, Problem 32E

Eclosion refers to the emergence of an adult insect from an egg. The following data on eclosion rates when nymphs were exposed to heat for various durations was extracted from the article “High Temperature Determines the Ups and Downs of Small Brown Planthopper Laodelphax Striatellus Population” (Insect Science, 2012: 385–392).

Duration (d)	0	1	2	3	5	10	15
Sample size	120	41	47	44	46	42	10
# Emerged:	101	38	44	40	38	35	7

Carry out a chi-squared test to decide whether it is plausible that eclosion rate does not depend on exposure duration (the cited article included summary information from the test).