Refer to the data in Table 13-8 on order fulfillment time.

• Table 13-8
• 
• You decide to develop a regression model using order value and the number of products in the order as predictors. Find the model equation. Is it significant at = 0.05?
• Find R² and R²_a and comment relative to the model in Exercise 13-9.
• Is the predictor, number of products, significant in the presence of the other predictor? Test using α = 0.05.
• Find a 95% confidence interval for the mean fulfillment time for an order value of $75,000 and the number of products being 65.

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TABLE 13-8 Data on Time to Fulfill Order Number of Number of Time Value Products Location Time Value Products Location 12 42 35 C 13 45 38 A 14 51 58 8 43 42 10 40 30 15 46 46 C 16 54 65 19 65 80 A 21 85 88 22 80 65 В 18 50 70 16 55 60 A 26 93 88 20 70 80 C 22 96 90 24 92 75 В 10 35 30 21 88 80 A 17 55 62 23 90 70 B 15 48 65 21 92 85 В 14 45 40 17 52 55 C 16 50 62 13 38 46 C 24 85 95 В 18 54 64 A 20 91 84 В 24 90 80 A Activat Win