Let x and y equal the act scores in social science and natural science, respectively, for a student who is applying for admission to a small liberal arts college. a sample of n = 15 such students yielded the following data: calculate the least squares regression line for these data. plot the points and the least squares regression line on the same graph. find point estimates for alpha, beta, and sigma^2.

Ms. sutton recorded the word counts and scores of the top ten essays in a timed writing contest. the table shows her data. how does the word count of an essay relate to its score in the contest? word count tends to decrease as the score decreases. word count tends to increase as the score decreases. word count tends to remain constant as the score decreases. word count has no apparent relationship to the score of the essay.

Use complete sentences to differentiate between a regular tessellation, and a pure tessellation. be sure to include specific types of polygons in your explanation.

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c =