Math Problem Statement
Consider the following monthly revenue data for an up-and-coming technology company.
Sales Data Month Revenue (Thousands of Dollars) Month Revenue (Thousands of Dollars) 1 325 10 819 2 547 11 831 3 539 12 848 4 580 13 860 5 640 14 863 6 699 15 879 7 697 16 903 8 708 17 912 9 797 18 908
The summary output from a regression analysis of the data is also provided.
Regression Statistics Multiple R 0.93482589 R Square 0.873899444 Adjusted R Square 0.86601816 Standard Error 59.72646232 Observations 18
ANOVA df SS MS F Regression 1 395,546.939628 395,546.939628 110.8828667 Residual 16 57,076.004816 3567.250301 Total 17 452,622.944444
Coefficients Standard Error t Stat P-value Intercept 470.50326797 29.37121675 16.01919566 2.83992E-11 Month 28.57275542 2.713437989 10.530093385 1.33255E-08 Step 1 of 3 : Write the estimated regression equation using the least squares estimates for b0 and b1 . Round to four decimal places, if necessary.
Solution
The estimated regression equation is of the form:
Where:
- is the estimated revenue (in thousands of dollars),
- is the month,
- is the intercept,
- is the slope of the line (representing the change in revenue per month).
From the regression output:
- The intercept ,
- The slope .
Thus, the estimated regression equation is:
This equation predicts the company's revenue based on the month.
Would you like more details or have any further questions?
Here are 5 related questions:
- How do you interpret the slope in the context of this problem?
- What is the significance of the intercept for this company’s revenue?
- What does the R Square value tell us about the fit of the model?
- How would you calculate the predicted revenue for month 20?
- What is the purpose of the Standard Error in regression analysis?
Tip: The closer the value of is to 1, the better the model explains the variability of the response variable.
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Math Problem Analysis
Mathematical Concepts
Linear Regression
Statistics
Algebra
Formulas
ŷ = b₀ + b₁x (Regression Equation)
R² (Coefficient of Determination)
Theorems
Least Squares Estimation
Suitable Grade Level
College Level, Advanced High School (Grades 11-12)
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