Suppose that the life expectancy of a lightbulb is modeled by an exponential distribution. You randomly sampled 6 bulb and found that they lasted 650 hours, 1123 hours, 67 hours, 1257 hours, 435 hours, and 1896 hours. Find the maximum likelihood estimate for the unknown parameter

Astudent is determining the influence of different types of food on the growth rate of spiders. she feeds one group of spiders two caterpillars twice a week. the other group received similarly-sized beetles twice a week. she records the amount of time required for individuals to reach sexual maturity. her hypothesis is that the spiders feeding on caterpillars will have a faster growth rate because caterpillars have a higher protein content compared to beetles. in this experiment, what is the dependent variable? spiders assigned to different feeding groups. time required to reach sexual maturity number of prey items fed twice a week. growth rates of each group.