Question

Recent research suggests that depression significantly increases the risk of developing dementia later in life (BBC News, July 6, 2010). In a study involving 949 elderly persons, it was reported that 22% of those who had depression went on to develop dementia, compared to only 17% of those who did not have depression.a. Choose the relevant population and the sample. (You may select more than one answer. Bold the answer(s) that are correct.)1. The sample consists of all elderly people.2. The sample consists of 949 elderly people.3. The population is all younger and elderly people.4. The population is all elderly people.b. Do the numbers 22% and 17% represent the population parameters or the sample statistics? Bold the answer that is correct.Population parametersSample Statistics

Answer 1

2. The sample consists of 949 elderly people

4. The population is all elderly people

B. The numbers 22% and 17% represents the sample statistics

Explanation:

The study was based on a recent research that suggest that depression significantly increases risk of dementia later in life, so for every result gotten from this study, it is tied to only the samples chosen for the aim of the study which are the 949 elderly people.