Assigment 1-2021 (elaborations) STATISTICS (MAT 135)

The formula for a regression equation is Y’ = 2X + 9. a. What would be the predicted score for a person scoring 6 on X? Y=2(6)+9=21 b. If someone’s predicted score was 14, what was this person’s score on X?For the X,Y data below, compute: a. r and determine if it is significantly different from zero.. the slope of the regression line and test if it differs significantly from zerothe 95% confidence interval for the slopeAt a school pep rally, a group of sophomore students organized a free raffle for prizes. They claim that they put the names of all of the students in the school in the basket and that they randomly drew 36 names out of this basket. Of the prize winners, 6 were freshmen, 14 were sophomores, 9 were juniors, and 7 were seniors. The results do not seem that random to you. You think it is a little fishy that sophomores organized the raffle and also won the most prizes. Your school is composed of 30% freshmen, 25% sophomores, 25% juniors, and 20% seniors.