Early- Onset Dementia. Dementia is the loss of the intellectual and social abili

Question

Early- Onset Dementia. Dementia is the loss of the intellectual and social abilities severe enough to interfere with judgment, behavior, and daily functioning. Alzheimer’s disease is the most common type of dementia. In the article “ Living with Early Onset Dementia: Exploring the Experience and Developing Evidence-Based Guidelines for Practice” (Alzheimer’s Care Quarterly, Vol. 5, Issue 2, pp. 111– 122), P. Harris and J. Keady explored the experience and struggles of people diagnosed with dementia and their families. The mean age at diagnosis of all people with early-onset dementia is 55 years.

Suppose the distribution of ages of all patients with early-onset dementia is left skewed.

            (1) What would be the shape of the distribution of ages within a sample of size 36?

            (2) What would be the shape of the distribution of mean ages for all possible samples of size 36?

Explanation / Answer

(1) Answer: Left skewed distribution

REASON: Given: The distribution of ages of all patients with early-onset dementia is left skewed.

(2) Answer: Normal Distribution

REASON: By Central Limit Theorem, since sample size = n = 36 > 30 , lage sample, even if the population is skewded, the distribution of mean ages ill be Normal Distribution/

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