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Question 2 (3.75 points) We should continue production if: Marginal contribution is positive, but we are only covering a portion of fixed costs Marginal contribution is positive, but only when we can cover all costs Marginal contribution is negative, but we are only covering a portion of fixed costs Marginal contribution is negative, but we are only covering a portion of fixed costs

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B4. [Total 20 marks] a) Given the following medical data records, fill in the two missing values (cf. the empty boxes) using attribute mean/mode for the same class defined by the "Fever" and "Disease" attributes. Table II Medical Data Records with Missing Values Blood Pressure Patient ID Sex Age Fever Disease Level 9100123 Male 65 Yes No 80-120 9303034 Female 55 No Yes 160-200 9210126 Male 12 Yes Yes 80-120 9142020 Female 35 No No 120-160 9910111 Male 46 No Yes 160-200 9576732 Male 16 Yes No 80-120 9910115 Female 28 No Yes 160-200 9576737 120-160 Yes No (4 marks) b) Given the following medical data records with a noisy "Age" value=105 (highlighted), smooth the "Age" values by using bin means. Show the steps and list ALL smoothed "Age" values for equi-depth partitioning with 4 bins. Table III Medical Data Records with Noisy Value Blood Pressure Patient ID Sex Age Fever Disease Level 9100123 Male 65 Yes No 80-120 9303034 Female 55 No Yes 160-200 9210126 Male 12 Yes Yes 80-120 9142020 Female 35 No No 120-160 9910111 Male 46 No Yes 160-200 9576732 Male 16 Yes No 80-120 9910000 Female 105 No Yes 160-200 9576000 Male 28 Yes No 120-160 (4 marks) c) With respect to a selected medical application context, give an example of a 3D data cube modelled for a data warehouse. Describe the 3 dimension tables and the fact table involved for your selected context. (8 marks) d) Based on your answer in part (c), describe how OLAP operations "Roll Up" and "Drill Down" work to answer a possible query arising from a medical application context. (4 marks) END

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The aging method for estimating uncollectible accounts considers that a higher percentage of "older" accounts will not be collected compared to "newer" accounts. A. True B. False Reset Selection Mark for Review What's This?

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Mc Graw Holl Macro- Fiscal Policy and Multipliers desired. Given our MPC of 0.75 and our necessary increase in GDP of \$160, how much should we increase government spending to fix the issue? Ritchie Whitlock \[ \$ 40.00 \] Alien Advisor Correct! Now let's say we were to approach the same problem with everything the same -- same MPC of 0.75 , same desired $ \$ 160 $ increase in GDP -- except we now want to do our fiscal policy via taxes. Do we want to increase or decrease taxes? $ A D, A S, P G D P $ Below Area 1.1 Price Level Submit $ 90^{\circ} \mathrm{F} $ Sunny Search

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On Dec. 31, 2018, what was the net open interest on Gold held by Swap Dealers? -17,234 -65,895 -62,324 153,318

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Using a feminist critique of Joyce, one student claimed that “Joyce’s text indulges dominance over submission.” Do you think there is textual evidence to support this assertion?

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What type of neurons carry impulses from senses receptors to the central nervous system

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(2) (Smoking) A recent Gallup survey of 1016 randomly selected adults showed that 21% of the respondents smoke. Use the 2% significance level to test the claim that 20% adults smoke. (a) Identify the null and alternative hypothesis in symbolic form. (b) Determine the type of test (Two-, Left-, or Right-tailed test), the critical value, and sketch the rejection region. (c) Suppose you failed to reject the null hypothesis, write a conclusion in plain English.

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C. Negative marginal returns, where additional cooks reduce the output produced. Part 2 D. Yes, restaurant owners can vary the size, or number, of kitchens.

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The following table shows the relationship between workers and output for a small factory in the short run, with capital held constant. The price of the firm's output is $5. Find the marginal physical product of labe (MPPL) and the marginal revenue product (MRPL). Total Physical Product (TPP) Labor Input MPPL MRPL 0 0 1 30 30 150 2 51 21 105 3 69 18 90 4 83 14 70 5 87 4 20 If the wage rate is $90, this firm will hire workers.

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chris c.