Question 3 a. Management of a nationwide Australian bank organised for a survey of its clients to assess the level of satisfaction with its services. To do this a staff member attempted to administer a survey to 3,000 of the bank’s 480,000 predominantly online customers and to 2,000 of the bank’s 320,000 predominantly face to face customers.. The survey administrator received 2,500 completed surveys from the 3,000 sent to online customers. Of the completed surveys, 875 indicated that the client was satisfied with the bank’s services. iv. State the name and the value of the statistic that is the best estimate for the proportion of the predominantly online client population that are satisfied. v. Use the Excel macro provided this session to determine a 90% confidence interval for the proportion of the online client population that was satisfied.
Question 3
a. Management of a nationwide Australian bank organised for a survey of its clients to assess the level of satisfaction with its services. To do this a staff member attempted to administer a survey to 3,000 of the bank’s 480,000 predominantly online customers and to 2,000 of the bank’s 320,000 predominantly face to face customers..
The survey administrator received 2,500 completed surveys from the 3,000 sent to online customers. Of the completed surveys, 875 indicated that the client was satisfied with the bank’s services.
iv. State the name and the value of the statistic that is the best estimate for the proportion of the predominantly online client population that are satisfied.
v. Use the Excel macro provided this session to determine a 90% confidence interval for the proportion of the online client population that was satisfied.
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