b) What is the probability that at least 4 browsing customers will buys something during a specified hour? c) What is the probability that no browsing customer will buy anything during a specified hour? d) What is the probability that not more than 4 browsing customers will buy something during a specified hour? Q5. i) Records were kept on three employees who wrapped packages on sweet boxes during the Diwali holidays in a big sweet house. The study yielded the following data Employee Mean Number Standard Deviation A 23 1.45 B 45 5.86 C 32 3.54 (i)Which package wrapper was most productive? (ii) Which employee was the most consistent? (iii) Which measure did you choose to answer part (ii) and why? Q6. Formulate Null and alternative hypothesis. Explain the difference with all examples. i)a customer of motorcycle wants to test whether the claim of motorcycle of certain brand gives the average mileage60 km/liter is true or false, (ii) the businessman of banana wants to test whether the average weight of a banana of Kerala is more than200 gm, (iii)a doctor wants to test whether new medicine is really more