Ten individuals are chosen at random from a population and their heights are found to be in inches 63, 63, 64, 65, 66, 69, 70, 70, 71. Discuss the suggestion that the Mean height of universe is 65. For 9 ...

A random sample of 900 member has a mean 3.4cms. Can it be reasonably regarded as a sample from a large population of mean 3.2cms and S.D. 2.3cms??