I am having some difficulty with some of the concepts in this assignment. Is it possible you could try out the questions and show me your work??
ADM2303 Asignment 4
For individual work only: Posting for Wider Distribution is Forbidden
1. A number of recent media stories have brought attention to the risk of unnecessary or
inappropriate medication use in older patients1 . The Canadian Deprescribing Network
estimates that ?among those 85 and older, nearly 40 per cent were taking 10 or more
drugs?. This network has announced a ?four-year plan with a goal of reducing unnecessary
or inappropriate medication use in older patients by 50 per cent by 2020?2 .
You read these articles and can?t believe these staggering numbers. You decide to follow
up and take a couple of samples to see for yourself what the proportion of seniors taking
10 or more drugs is. You draft a short questionnaire, including the question ?How many
drugs do you take on a regular basis??. You ?rst go to a retirement home and ask
20 seniors over 85 to ?ll in a short questionnaire for you. Then you ask an elderly
neighbour to get her friends over 85 to ?ll in the questionnaire, as well. She is able to
collect responses from 10 people.
Total for Question 1: 9
(a) (3 points) Please comment on the methodology. Is it appropriate to answer your
question? What kind of sampling are you using? Are there issues with this methodology?
(b) (6 points) ] You go over the results from your study, and ?nd that in the seniors
home sample 47%, and in the neighbour?s sample 12% of respondents take more
than 10 drugs. If the Canadian Deprescribing Network is right, what is the probability of obtaining these results? Would you believe that both your samples are
representative of the overall population of seniors over 85?
Make suitable assumptions to perform the calculations and comment on their validity.
2. Another news outlet reports that ?The average senior household spends $500 each year
on prescription drugs?3 .
Total for Question 2: 6
(a) (2 points) You pick a random senior household and ask about their yearly drug
costs. What is the probability that this household spends more than $700 each year
on prescription drugs? (Assume a normal distribution with a standard deviation of
(b) (4 points) What is the probability that the average spending among senior households in a random sample with 30 respondents is between $600 and $800? (Continue
to assume a normal distribution with a standard deviation of $400.)
3. The news report actually did not contain any reference to a standard deviation, so do
not assume you know the standard deviation for this question.
You come across a sample of 7 senior households on the internet. It lists the following
yearly drug costs for the households: 1156, 387, 2343, 976, 2823, 84, 876.
Total for Question 3: 4
(a) (4 points) As you know, it can be di?cult to obtain proper random samples. Would
you believe that this sample could have been randomly selected from the same
population mentioned in the news report?