Announcements A high school in Wisconsin stopped having anno

Announcements. A high school in Wisconsin stopped having announcements read to students over the intercom system, choosing to have announcements displayed on television monitors located throughout the building. To see how students fed about the new system the principal wants to conduct a survey. Explain how to select a sample of about 500 students using each sampling method below: Simple random sample Stratified random sample with grade levels as strata Cluster sample with classrooms as clusters Survey. A local news station wants to know what percentage of people favor investing in new public light-rail system for the city. They conduct a survey, calling homes between 10:00 a.m. and 3:00 p.m. Explain why this sampling plan is biased. UFOs. A National Geographic survey in 2012 found that 36% of Americans believe in aliens. (The outer-space kind, not visitors from foreign countries!) If you were to randomly select 10 Americans, what is the average number of believers you\'d expect in your sample? Conduct a simulation to find out! Explain how you will use the random numbers listed below to conduct your simulation. Carefully label your simulation for 2 trials. Doro When trying to reduce energy costs for a home, one strategy is to install high quality doors. A consumer service wants to test two brands (A and B) of doors to see which is more effective at preventing loss of heat They have four doors of each brand they will install in a small cabin built for this purpose. The cabin has places for four doors on the north wall and four on the south wall. The inside of the cabin will be heated, and monitors will be placed outside each door to measure the amount of heat loss. Use the random numbers given to decide which doors to to put in which position. Explain your method clearly. 59796 89832 57413 Briefly explain why your assignment strategy is important in helping the manager assess the effectiveness of the doors.

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