d​‌‍‍‍‌‍‍‍‌‍‍‍‌‌‌‌‌‌‍‍​ata analysis dissertation on: changes in sleep neurophysioloygy due to ageing and neurodegeneration. the data analysis will be Comparing sleep polysomnography of patients with alzheimer disease and a healthy control group retrieved from an online database. I am a biomedical science undergraduate student and i would like a draft sent prior to the deadline.