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Improving SAT scores. Refer to the Chance (Winter 2001) study of students who paid a private tutor (or coach) to help them improve their Standardized Assessment Test (SAT) scores, Exercise 4.50 (p. 223). Recall that multiple regres- sion was used to estimate the effect of coaching on SAT- Mathematics scores, where
y = SAT- Math scorex1 = score on PSATx2 = {1 if student was coached, 0 if not}
(a) Write a complete second-order model for E(y) as a function of x1 and x2.
(b) Give the equation of the curve relating E(y) to x1 for noncoached students. Identify the y-intercept, shift parameter, and rate of cur- vature in the equation.
(c) Repeat part b for students who have been coached on the SAT.
(d) How would you test to determine if coaching has an effect on SAT- Math scores?
What are the major reasons for these nations to question their participation in the EU? Are they political or economic considerations?
Discuss this result and explain why you do (or do not) find the implications plausible.
A couple has found a house which cost $201,500. They will put down $22,000 and finance the remainder with a 30-year mortgage loan from Bank of America at 4.65% interest (compounded monthly). If they escrow their HOA fees, insurance, and taxes at $..
Now suppose technology grows at a rate of 2 percent. Recalculate your answers to ( a ) and ( b ).
How will you use student assessment to inform (make decisions) about your teaching?
What is the marginal cost of producing a 301s unit A 401st unit If you are comfortable doing so, you may answer this question by writing down the marginal cost function directly, rather than recalculating total cost for q = 301 and q = 401.
An economist has predicted that for the next 5 years inflation will be 8%, and then there will be 5 years at 6% inflation rate. This is equivalent to what average price change per year for the entire 10-year period
Water damage from flooding related to hurricane Sandy in two northeastern Cities resulted in damages estimated at $216 million. As a result of the claimant payouts, insurance companies raised homeowners' insurance rates by an average of $118 per y..
If the spring were owned by a government that applied the marginal principle, what price would it charge?
The following data is available for an economy. Compute the inflation rate (measured from year 1 to year 2) using the GDP deflator and taking as base first year 1 and then year 2 Price of Peanuts in Year 1 $1.60 Quantity of Peanuts in Year 1 275 Pr..
Fill in the missing values for TFC, TVC, AFC, AVC, ATC, MC, TR, MR, and Total Profit in the blue sections of the table. Winsome Widget Factory Output Total Fixed Cost Total Variable Cost Total Cost Average Fixed Cost Average Variable Cost Average ..
Two oligopoly firms are in the process of evaluating their marketing strategies. Firm 1 can generate estimated profits of $10 million from strategy A if the second firm reacts by strategy C, and $15 million from strategy A
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