Question

•The duration of Alzheimer's disease from the onset of symptoms until death ranges from 3 to
20 years, the average is 8 years with a standard deviation of 4 years. The administrator of a
large medical center randomly selects the medical records of 30 deceased Alzheimer's patient
from the medical center's database, and records the average duration,
1. The average duration is less than 7 years.
2. The average duration exceeds 7 years.​

Answer 1

Answer:

I CANT UNDERSTAND WHAT YOU WROTE

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