(b) Your friends pick a different random sample of a different size and they actually conclude that there is a 98% chance that the average salary of the salaried populationof the city lies in the interval mentioned in previous part i.e., 40025 and 43975. Howmany individuals they must have picked in their sample?(c) Based on your data of 9 individuals given above, your team member concludes thatwe can safly claim that the average salary of the salaried population is more than40000. Can you make this claim at ? = 0.01 significance level? Clearly state what Nullhypothesis you will use

2. It is known that the monthly income of salaried persons in a large city are normally dis tributed with a standard deviation of 3600 Rs.. (a) A random sample of 9 individuals from this population is taken and it is found that their salaries are as follows: 44000, 41000, 43000, 42500, 43500, 41500. 41000, 46500, 35000 What is the probability that the average salary of the whole salaried population in the city lies somewhere between 40025 and 43975