. Jerry Sam owns and operates a chain of 12 department stores in New Ville. Sales figures and advertising expenses for the stores are provided in the table below. Sales are given in millions of dollars; advertising expenses are in tens of thousands of dollars. Store Advertising Sales 1 14 6 2 11 3 3 15 5 4 16 5 5 24 15 6 28 18 7 22 17 8 21 12 9 26 15 10 43 20 11 34 14 12 9 5 i. Calculate the slope for the regression line. (show all working)  ii. Calculate the intercept for the regression line. (show all working)  iii. Write the equation for the regression line.  iv. Forecast sales for a store if advertising spending is:- 1. $240,000  2. $300,000

Sales over the past 10 years are shown below. Using the method of least squares, calculate the values of a and b to complete this regression equation.   Year Sales 1 1,640 2 1,850 3 1,240 4 1,250 5 1,980 6 1,400 7 1,060 8 1,430 9 1,050 10 1,990   (Indicate a negative answer using a "-" sign. Do not round intermediate calculations and round your answer to 3 decimal places.)       What is your forecast for next year's sales? (Do not round intermediate calculations and round your answer to 2 decimal places.)

4. The number of auto accidents in Athens, Ohio, is related to the regional number of registered automobiles in thou- sands (X1), alcoholic beverage sales in $10,000s (X2), and rainfall in inches (X3). Furthermore, the regression formula has been calculated as: Y=a+b1X1 +b2X2 +b3X3 Where Y = number of automobile accidents a = 7.5 bl = 3.5 b2 = 4.5 b3 = 2.5 Calculate the expected number of automobile accidents under conditions a, b, and c: X, X2 X, (a) 2 3 (b) 5 1 (c) 7 2 N m4

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Period (t) Enrollment (1000s) 1 6.5 2 8.1 3 8.4 4 10.2 5 12.5 6 13.3 7 13.7 8 17.2 9 18.1 Develop a linear regression with a dependent variable of “Enrollment (1000s). A.What is the value of R square? (Make sure two decimal places.) B.What is the value of intercept? (Make sure two decimal places.) C.What is the coefficient value of Period (t)? (Make sure two decimal places.) D.Is the coefficient of Period (t) significant? (Yes:1, No: 0) E.What is the forecast for year 10?

Hi, I need help with solving for the following values (boxed). Thank you.

Use a graphing calculator to create a scatter plot and find the line of best fit and the correlation coefficient for the following data. Round to the nearest hundredth. X 5 10 15 20 25 30 35 y 1,800 1,750 1,590 1,490 1,400 1,275 1,010

Your company is preparing an estimate of its production costs for the coming period. The controller estimates that direct materials costs are $45 per unit and that direct labor costs are $23 per hour. Estimating overhead, which is applied on the basis of direct labor costs, is difficult. The controller's office estimated overhead costs at $4,000 for fixed costs and $17 per unit for variable costs. Your colleague, Lance, who graduated from a rival school, has already done the analysis and reports the "correct" cost equation as follows. Overhead = $10,511 + $15.94 per unit Lance also reports that the correlation coefficient for the regression is 0.81 and says, "With 81% of the variation in overhead explained by the equation, it certainly should be adopted as the best basis for estimating costs." When asked for the data used to generate the regression, Lance produces the following: Month LEMASTOSOHN3 1 2 4 5 6 7 8 9 10 11 12 13 Overhead Unit Production $57,064 60,683 77,008 56,624 81,700…

help  please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working