G An article in Concrete Research "Near Surface Characteristics of Concrete: Intrinsic Permeability, (1989, Vol. 41) presented data on compressive strength x and intrinsic permeability y of various concrete mixes and cures. Summary quantities are n = 14, Xn i=1 yi = 572, Xn i=1 y 2 i = 23530, Xn i=1 xi = 43, Xn i=1 x 2 i = 157.42, Xn i=1 xiyi = 1697.80 Assume that the two variables are related according to the simple linear regression model. (a) (20pts) Calculate the least squares estimates of the slope and intercept.

Two language majors, anna and megan, took exams in two languages. anna scored 85 on both exams. megan scored 74 on the first exam and 85 on the second exam. overall, student scores on the first exam had a mean of 82 and a standard deviation of 4, and the second exam scores had a mean of 71 and a standard deviation of 13. a) to qualify for language honors, a major must maintain at least an 85 average across all language courses taken. so far, which of anna and megan qualify? b) which student's overall performance was better?

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

The probability that you roll a two on a six-sided die is 1 6 16 . if you roll the die 60 times, how many twos can you expect to roll