Question: In Germany, high school students are required to take an exit exam, called the Arbeit. The Arbeit is used to tell students which colleges, universities, or trade schools will accept them. During the Covid19 pandemic, the German government sent out 5000 practice tests to help students prepare. Researchers in Germany then wanted to see if the practice
In Germany, high school students are required to take an exit exam, called the Arbeit. The Arbeit is used to tell students which colleges, universities, or trade schools will accept them. During the Covid19 pandemic, the German government sent out 5000 practice tests to help students prepare. Researchers in Germany then wanted to see if the practice exam was useful for students during the pandemic. The average number of correct questions is 140, with a population standard deviation of 80. What size should a sample be if a researcher wants to be within 10 standard devs?