In a sales pitch TriCon, a strategic marketing company, claims they have been able to increase the sales of their previous clients by any average of 3%.A sample of quarterly sales reports of other companies before and after hiring TriCon is provided below(also available for download hereSales.xlsx).Given _BEFORE= 2.67 and _AFTER= 3.48,at a 5% level of significance can you conclude that, for othercompanies, hiring TriCon has lead to a growth in sales?YOU CAN ASSUME THE POPULATION TO BE NORMALLY DISTRIBUTED.

Quarterly sales (in millions)Before TriCon PlanAfter TriCon Plan5.97.595.126.254.598.634.727.334.517.067.28.756.336.65.337.355.648.186.726.066.777.617.866.026.718.225.328.646.048.345.457.875.486.425.776.284.458.696.38.045.067.957.247.746.236.327.49

a) Properly state the mathematical hypotheses:(1 mark)

b) p-value:(3 marks)

c) Conclusion:(2 mark)(YOU MUST EXPLAIN YOUR ANSWER MATHEMATICALLY FOR THE MARK)