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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.)i. The sample consists of all elderly people.ii. The sample consists of 949 elderly people.iii. The population is all younger and elderly people.iv. 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.i. Population parametersii.Sample Statistics

Answer :

cchilabert

Answer:

a. ii. and iv.

b. ii.

Step-by-step explanation:

Hello!

The research study involves elderly persons it was divided into two considering those who suffered depression and those that didn't suffer depression, then the proportion of persons that suffered dementia was counted.

a. Choose the relevant population and the sample.

i. The sample consists of all elderly people.

ii. The sample consists of 949 elderly people.

iii. The population is all younger and elderly people.

iv. The population is all elderly people.

Note: When you determine a population from a text, you NEVER mention a number, even if the population is finite and the total of individuals in it is known. When you determine a sample it always comes with its size.

b. Do the numbers 22% and 17% represent the population parameters or the sample statistics?

i. Population parameters

ii.Sample Statistics

The proportions were determined after taking the sample, as said in the text, first the sample was taken, then the researchers determined from this sample wich elders suffered from depression and which didn't suffer from depression and these two groups, the number of people with dementia was determined. Meaning these are sample values, not population parameters.

I hope it helps!

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