Rewrite the statement in mathematical notation. (Let R be the annual revenue of your company, q be the annual sales, and t be time.) The annual revenue of the tie-dye T-shirt operation is currently $4,000 but is decreasing by $900 each year. How fast are annual sales changing? R = dR %3D dt Rewrite the question in mathematical notation. Find dq/dy. O Find dR/dy. O Find dt/dy. O Find dq/dt. Find dR/dt.

You want to know if the type of music one listens to while running impacts their speed. You recruit 50 participants. These participants listen to classical music while running two laps on a track. You time how long it takes each person to run those two laps. A week later, the same participants run two laps on the track while listening to country music. You time how long it takes each person to run those two laps. All else held constant, which of the following would increase power? O Use alpha .01. O Reduce participants to 40. O Use a directional hypothesis. O Conduct a between-subjects design.

Use Excel to develop a regression model to predict Annual Food Spending by Annual Household Income for those living in the Metro area only.     Suppose a household in the metro area has an annual income of $60,000.  Predict how much they spend on food per year.  Write your answer as a number and round to 2 decimal places.   Annual Food Spending ($) Annual Household Income           ($) Non mortgage household debt ($) Region:   1 = NE     2 = MW    3 = S       4 = W Location:   1 = Metro      2 = Outside Metro 8909 56697 23180 1 1 5684 35945 7052 1 1 10706 52687 16149 1 1 14112 74041 21839 1 1 13855 63182 18866 1 1 15619 79064 21899 1 1 2694 25981 8774 1 1 9127 57424 15766 1 1 13514 72045 27685 1 1 6314 38046 8545 1 1 7622 52408 28057 1 1 4322 41405 6998 1 1 3805 29684 4806 1 1 6674 49246 13592 1 1 7347 41491 4088 1 1 2911 26703 15876 1 1 8026 48753 16714 1 1 8567 55555 16783 1 1 10345 71483 21407 1 1 8694 50980 19114 1 1 8821 46403 7817 1 1…

Fill in the blanks. a. The cross-product term in a regression equation is often referred to as an _______ term. b. If two predictor variables x1 and x2 interact, then the change in the conditional mean of y for a change of one unit in x2 (with x1 held fixed) depends on _______. c. In a regression model, the cross-product term between x1 and x2 is given by ________.

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