Evaluate the permutation. P(n,1) P(n,1)=(Simplify your answer.)

Ice Cream An owner of an ice cream shop wants to determine the factors that affect ice cream sales in a day.  Over 9 days, he calculates the Sales (in $100) of the shop, the high temperature that day (Temp), whether it was a Weekend (1 if it was weekend, 0 if it was a weekday),  whether it was Rainy that day (1 if it was rainy, 0 otherwise), and how many Employees simultaneously worked the shop that day.  His data is as follows:   Temp Weekend Rainy Employees Sales 80 0 0 3 197 103 0 0 2 200 81 1 1 2 213 73 0 0 4 172 91 0 0 4 177 87 0 0 2 193 77 1 0 3 251 74 0 0 4 182 77 1 1 3 177 He fits the model:    Sales = β0 + β1(Temp) + β2(Weekend) + β3(Rainy) + β4(Employees) +εi   and estimates the coefficients using linear regression.   1) Find the regression equation. (Round your answers to 4 decimal points)   Sales = + (Temp) + (Weekend) +  (Rainy)+  (Employees)   2) The owner believes that, everything else held constant, the shop has more sales on weekend days.  Test…

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Evaluate the given expression. P(n, 0)