You want to convince a local store owner to contract with you to provide pastries for his store. You need a random sample of 150 residents to conduct a survey about the quality of your pastries. There are 10 streets in the vicinity of the store. Determine which sampling method is best suited in this situation and describe how it would be carried out.

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.