As part of a study at a large university, data were collecte…

As part of a study at a large university, data were collected on n = 224 freshmen computer science (CS) majors in a particular year. The researchers were interested in modeling y, a student’s grade point average (GPA) after three semesters, as a function of the following independent variables (recorded at the time the students enrolled in the university):          = average high school grade in mathematics (HSM)        = average high school grade in science (HSS)        = average high school grade in English (HSE)        = SAT mathematics score (SATM)        = SAT verbal score (SATV)   A first-order model was fit to data with R2 = 0.211.   What is the correct interpretation of , the coefficient of determination for the model?

The tread life of a particular brand of tire is a random var…

The tread life of a particular brand of tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 2500 miles. What is the probability a certain tire of this brand will last between 54,750 miles and 55,500 miles?