If the standard error of the population is reduced by 50 per cent, the sample size becomes

Increase 4 times

• The average weight of 40 passengers in a bus is 58 kg. When the weight of the driver, conductor and their two helpers is included, the average weight increased by 2 kg. When the weight of the bus is also included, the average weight becomes 7 times the av
• A milkman produces three kinds of milk. On a particular day, he has 170 litres, 102 litres and 374 litres of the three kinds of milk. He wants to bottle them in bottles of equal sizes so that each of the three varieties of milk would be completely bottled
• If we took the 500 people attending a school in New York City, divided them by gender, and then took a random sample of the males and a random sampling of the females, the variable on which we would divide the population is called the ........
• If the MAX_SIZE is the size of the array used in the implementation of circular queue, assume array index start with O, front points towards the first element in the queue, and rear points towards the last element in the queue. Which of the following cond
• A barrel contains a mixture of wine and water in the ratio 3 : 1. How much fraction of the mixture must be drawn off and substituted by water so that the ratio of wine and water in the resultant mixture In the barrel becomes 1:1