can you do this in a couple of hours?
can you do this in a couple of hours?
Homework 8: Theoretical Distributions Instructions: Answer the following questions. YOU MUST show your work for full credit. You can do this by taking photos and pasting them into this document. Use complete sentences where appropriate. Please upload your completed homework to Blackboard as a .doc or .pdf. The distribution of 800 final exam scores in all of a college’s introduction to psychology courses was normally distributed, with μ = 75, σ = 9. What proportion of the students had scores between 70 and 79? How many of the 800 students would be expected to have scores between 70 and 79? Would you expect to find the same proportion between scores of 80 and 89? Why or why not? A psychologist administers a cognition test (higher scores refer to higher cognitive performance) to a population of Alzheimer’s Disease patients at a senior center. At this center, μ = 145, σ = 20. What is the probably of randomly selecting an individual with a cognition score above 120?
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