 Hello and welcome to the session. In this session we are going to discuss the following question and the question says that A famous restaurant serves variety of burgers, rice and hot dogs. More than 250 customers dine there everyday. The owner of the restaurant wants to know customers favorite dish. For this he questions any 5 customers who arrive at his restaurant, find the sample and population of the survey is the sample reasonable. We know that population is the entire group of people or objects and sample is a part of the population. With this key idea let us proceed to the solution. In this question we are given that the owner of the restaurant wants to know customers favorite dish and for this he questions any 5 customers who arrive at his restaurant randomly. So the population is all the customers at the restaurant. From the key idea we know that population is the entire group of people or objects and sample is a part of the population. So we can say the sample is the 5 customers whom he had asked the question. Now we also need to check whether the sample is reasonable or not. For this we know the sample should satisfy the following conditions. The first condition is sample should be selected at random. Second it should be a representative of the population. And third it should be large enough to provide accurate data. We know that he has chosen any 5 customers so sample selection is random and therefore the first condition is satisfied. Next we know the persons chosen are the customers of that restaurant. So they represent the population thus second condition is also satisfied. It is also given that more than 250 customers come but he chose 5 to draw this conclusion. The sample is very small as compared to the population. So we can say the sample is not large enough to provide accurate data. Thus the third condition is not satisfied and therefore we conclude that it is not a reasonable sample. This completes our session. Hope you enjoyed this session.