tratified samples are widely used to study large areas of forest. Based on satellite images, a forest area in the Amazon pasin is divided into 14 types. Foresters studied the four most commercially valuable types: alluvial climax forests of juality levels 1, 2, and 3, and mature secondary forest. They divided the area of each type into large parcels, chose parcels of each type at random, and counted tree species in a 20- by 25-meter rectangle randomly placed within each arcel selected. Here is some detail: Forest Type Climax 1 Climax 2 Climax 3 Secondary Parcels 36 72 31 42 |Sample Size We want to choose the stratified sample of n= 18 parcels in total. Show your work for the following questions. i). How many parcels should be sampled from each stratum? ii). Use a random number generator (Excel or online applet) or the random digits below to select a simple random ample of the size you get from part (i) without replacement within stratum Climax 1. Explain how you assign labels to parcels and which parcels are selected. If you use a random number generator, upload a screenshot that shows how you enerate the random numbers. 59051 64817 87174 09517 84534 06489 87201 97245

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