Every few years, the national assessment of educational progress asks a national sample of eighth-graders to perform the same math tasks. the goal is to get an honest picture of progress in math.
suppose these are the last few national mean scores, on a scale of 0 to 500.

year: 1990 1992 1996 2000 2003 2005 2008 2011 2013
score: 265 266 270 271 276 277 279 287 289

(a) make a time plot of the mean scores, by hand. this is just a scatterplot of score against year. there is a slow linear increasing trend.
(b) find the regression line of mean score on time step-by-step.
first, calculate the mean and standard deviation of each variable and their correlation (use a calculator with these functions). then find the equation of the least-squares line from these. (round your answers to two decimal places.) draw the line on your scatterplot.

In return for their with optimizing his painting project, the castle servant informed poly and digit that he saw someone dressed as the king leaving behind a trail of crumbs as he walked into the jester's room late last night. poly and digit have finally found the crisp-collecting culprit — it turns out the jester's shoe size and hair color match the clues that were found! in gratitude, poly and digit agree to the servant with his current task of replacing all of the tables and chairs in the castle. his goal is to determine which furniture company should produce the new furniture. he receives information from a company that customizes elegant furniture, and he wants to analyze the company's production process in order to calculate some problems about cost and availability. read the following scenario, and assist poly and digit as they the servant with his calculations. the fit for a king furniture company requires 2020 hours of labor to produce a standard table, and a chair requires 1212 hours of labor. the labor available is 565565 hours per week. the company can produce at most 3535 chairs per week.

Issued to the joint planning and execution community (jpec) initiates the development of coas; it also requests that the supported ccdr submit a commander's estimate of the situation with a recommended coa to resolve the situation (joint force command and staff participation in the joint operation planning and execution system, page 10)

8. problems and applications q8there are four consumers willing to pay the following amounts for haircuts, and there are four haircutting businesses with the following costs: consumers' willingness to payyvette: $35cho: $15sean: $45bob: $25firms' costsfirm a: $40firm b: $20firm c: $10firm d: $30each firm has the capacity to produce only one haircut. for should be given. which businesses should cut hair? check all that apply. firm afirm bfirm cfirm dwhich consumers should have their hair cut? check all that apply. bobchoseanyvettethe maximum possible total surplus is