Suppose we are making predictions of the dependent variable y for specific values of the independent variable x using a simple linear regression model holding the confidence level constant. Let Width (C. I) = the width of the confidence interval for the average value y for a given value of x, and Width (P. I) = the width of the prediction interval for a single value y for a given value of x.

Which of the following statements is true?

(A) Width (C. I) = 0.5 Width (P. I)
(B) Width (C. I) < Width (P. I)
(C) Width (C. I) > Width (P. I)
(D) Width (C. I) = Width (P. I)

Paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each? 1. define a variable for the situation. 2. write an inequality that represents her profit. note: revenue is money coming in. cost is money going out. profit is the difference between the revenue and the cost. in other words: revenue - costs profit 3.using words, describe how many windows she must sell to have a profit of at least $48,000.