ATS2946 Task 4 Solution

Information
Question 1: Inference from a sample
Read the following description of the results of a survey conducted by a large Australian bank. Identify the sample, population and target property and comment on whether the poll result provides a good reason to accept the conclusion that is drawn. If you identify multiple issues with the inference from a sample, discuss them.
Question 1
Complete
Mark 11.00 out of 12.00
Opal Banking Union, a large Australian bank, wants to determine the degree of customer satisfaction with its services. It commissions web developers to add a feature to their online banking app: after one month of use, each new customer receives a prompt which asks them to report any issues they have encountered by typing in a textbox. They can also dismiss the prompt by clicking "I haven't encountered any issues”. After collecting data for 12 months, the bank receives over 35,000 responses. Of these responses, 12,000 reported an issue, and the remainder selected “I haven't encountered any issues”. In their internal annual report, Opal Banking Union reports that roughly 30-40% of their customers were dissatisfied with the bank’s services, and thus they must do much more to improve the customer experience.
Marking scheme:
Mark Comments
Sample correctly identified /2
Population correctly identified /2
Target property correctly identified /2
Evaluation of the argument /6
TOTAL /12
Sample:
The 35000 responses which collected by Opal Banking Union through their online banking app.
Population:
The entire group of Opal Banking Union's customers use their online banking app.
Target Property:
Customer satisfaction with Opal Banking Union's services.
Do the poll results support the conclusion drawn?:
Therefore, the results of this survey cannot be used to support the conclusion about the satisfaction levels of the entire population of Opal Banking Union's customers.
Comment:
Mark
Sample correctly identified 1/2 Not quite. The sample is: the
35,000 new
customers who responded to the prompt on Opal Banking Union’s app.
Population correctly identified 2/2 Correct.
Target property correctly identified 2/2 Correct.
Evaluation of the argument 6/6 Three problems identified.
Very good
TOTAL 11/12


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Question 2: Argument for causation
Question 2
Complete
Mark 10.00 out of 12.00
Marking scheme

M k C t
Mark
Comments
Answer to the question whether the argument is successful in establishing the causal claim
/2
Justification for the answer
/10
TOTAL
/12
Therefore, while the evidence cited in the passage brings some support for a causal relationship between the amount of time children spend watching videos online and their academic performance, it does not determine whether the amount of time spent watching videos brings affect children's academic performance.
Comment:
Marking scheme
Mark
Comments
Answer to the question whether the argument is successful in establishing the causal claim
0/2 You didn’t answer the question. This is a yes or no question and you equivocated. You basically say that there isn’t a proven causal link, but at no point say this plainly and clearly.
Justification for the answer
10/10 Problems with correlation identified.
Problems with causation
identified, i.e., common/confounding causes.
TOTAL
10/12
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