
Chapter 11
PB
Statistical Inference: Hypothesis Testing for Two Populations
385
employees. For measuring effectiveness of the train-
ing programme the company has taken a random
sample of 7 employees and obtained their training
scores (before and after). Assume that the difference
is normally distributed. The scores obtained by the
employees before and after the training programme
are given in the following table:
Employee No. Before training After training
1 30 32
2 29 31
Employee No. Before training After training
3 28 29
4 32 30
5 27 28
6 31 30
7 32 31
Using a = 0.01, test the hypothesis to ascertain
whether the training has boosted the morale of the ...