Econ1320

# Econ1320 - Take Assessment: Quiz 1 Name Quiz 1 Instructions...

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Take Assessment: Quiz 1

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Name Quiz 1 Instructions This quiz is due on 18 Aug 2008 before 10 pm. Read the CML instruction sheet carefully before you begin, and take particular note of the rules in step 4. If you have entered answers to your questions but wish to continue working on your quiz at a later date, remember to click 'save' at the bottom of the page before you exit Blackboard. There are different types of questions including multiple choice (round buttons), multiple answer (square buttons), and calculation questions. Furthermore, only answer in numbers (unless the question otherwise requires) and omit any unit signs (such as dollar signs and percentage signs). Multiple Attempts Not allowed. This Test can only be taken once. Force Completion This Test can be saved and resumed later.
Question Completion Status: 1 2 3 4 5 6 7 8 9 Question 1 1 points Save Which of the following is/are assumptions underlying the test for the equality of two variances?

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1. the sample s are indepe ndent 2. both populat ions are normall y distribu ted 3. both populat ions have the same mean 4. 1 and 2 5. 1 and 3 6. 1,2 and 3
Question 2 2 points Save A public opinion survey wished to determine if support for new tree clearing laws differed between metropolitan (M) and regional (R) areas. Of the 620 metropolitan households interviewed, 440 indicated they supported the tree clearing laws, while only 220 of the 390 regional households indicated support. Construct a 90% confidence interval for the difference between the proportions of metropolitan and regional households favouring the new laws. Write the difference as M - R and state the lower limit correct to 3 decimal places. Question 3 5 points Save A local real estate agent wished to determine whether there was a difference between the mean sale price of houses in the suburbs of Toowong and St Lucia. However, first she needed to check whether it would be appropriate to use a pooled variance t test. A sample of 25 properties sold during the last month in Toowong yielded an average sale price of \$225500 with a standard deviation of \$32600, while a sample of 16 properties sold in St Lucia during the last month yielded an average sale price of \$247900 with a standard deviation of \$48300. Assume that 5% is an appropriate level of significance for the

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## This note was uploaded on 10/21/2009 for the course ECON 1320 taught by Professor John during the Three '08 term at Queensland.

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Econ1320 - Take Assessment: Quiz 1 Name Quiz 1 Instructions...

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