Answer to Question #107583 in Statistics and Probability for Yusuf

Question #107583

Autism Spectrum Disorder is a group of complex brain development disorders. The information on 4 separate varibles below is based on a sample of 500 people living with Autism
Spectrum Disoder (ASD) in South Africa.

Question 4
Suppose we are interested in the average age of diagnosis for everyone living with ASD in South
Africa. Which one of the following statements is incorrect?
(1) A sample refers to the 500 people whose data was collected.
(2) A population refers to everyone living with ASD in South Africa.
(3) The age of diagnosis is a variable.
(4) The mean (average) age of diagnosis calculated from the sample is a parameter.
(5) None of the above.

Expert's answer

(4) The mean (average) age of diagnosis calculated from the sample is a parameter.

It is a statistic.