Define small sample tests. Why do we use the t-distribution instead of the normal distribution for small samples? State the assumptions of the t-test for a single mean.
2.The mean weight of students in a class of size 9 is found to be 47.5 kg with a standard deviation of 2.5 kg.
Test whether this sample could have come from a population with mean 50 kg, at the 5% level of significance