SAT scores How strong was the association between student scores on the Math and Verbal sections of the old SAT? Scores on each ranged from 200 to 800 and were widely used by college admissions offices. Here are summaries and plots of the scores for a graduating class at Ithaca High School: Variable Count Mean Median StdDev Range IntQRange Verbal 162 596.296 610 99.5199 490 140 Math 162 612.099 630 98.1343 440 150 Dependent variable is: Math R-squared = 46.9% s = 71.75 with 162 - 2 = 160 df Variable Coefficient SE(Coeff) t-ratio P-value Intercept 209.554 34.35 6.10 0.0001 Verbal 0.675075 0.0568 11.9 0.0001 a) Is there evidence of an association between Math and Verbal scores? Write an appropriate hypothesis. b) Discuss the assumptions for inference. c) Test your hypothesis and state an appropriate conclusion.
LAB ACTIVITY 1 Welcome to the first “real” lab assignment of the semester! Remember that each lab assignment (including this one) will be worth 10 points. You’ll get to keep your best 12 lab assignment grades, so there are 120 points possible (out of 500 total) on all of your labs. The primary goal of today’s lab is to introduce you to Minitab, the statistical software we will use for this class. Complete this worksheet—with a partner if you wish—and at the end you will be asked to submit your answers in ANGEL. Each student must turn in the lab individually, even if you teamed up during the lab class. If you get stuck on anything, help is available! Check with the folks around you, and if you all have the same question then flag down the teaching assistant or the lea