The management of the "El Paraso" furniture store, a chain of furniture stores, designed an incentive plan for its sales agents. To evaluate this innovative plan, 7 vendors were randomly selected, and their income before and after the plan was recorded.

Seller	Before	Later
Luis	320	340
Carlos	290	285
Pedro	421	475
Camilo	510	510
Hernan	210	210
Juan	402	500
Manuel	625	631

Was there any significant increase in a seller's weekly income due to the innovative incentive plan? Use the 0.1 level of significance. Write your answers to 4 decimal places. If it is a two-tailed test, in the Critical value write only the positive value

a) Formulate the null hypothesis and the alternative hypothesis. Answer

b) Calculate the degrees of freedom for the test statistic

c) Compute the value of the test statistic Answer

d) Calculate the critical value Answer

e) Calculate the p-value

f) What is your decision?