Interpretation: As the p-value =0.037

Interpretation: As the p-value 0.05, indicating that it lies in the critical region and therefore we do not accept the null hypothesis and accept the alternative hypothesis. Hence we conclude that the time (in seconds) it takes to assemble a part is not equal for the two groups (at 5% level of significance). This means that one of the two types of training programs is better than the other as far as reduction in average assembly time (in seconds) of employees is concerned. Which one ? Question 3: Twelve horses were fed on diet A and 15 on diet B. the gains in weight for the individual horses (in pounds) were follows. A: 23 30 28 34 B: 44 34 22 28 24 47 25 40 33 31 32 30 24 32 30 35 31 28 35 21 35 29 22 Test whether there is any significant difference between the two diets. Use a = 0.05. Question 4: The heights of six randomly selected sailors are in inches: 62, 64, 67, 68, 70 and 71 and those of ten randomly selected soldiers are 62, 63, 65, 66, 69, 69, 70, 71, 72 and 73. Discuss in the light of these data that soldiers are on the average taller than sailors. Use a 0.05. Question 5: In a test given to two groups of students, the marks obtained were as follows: First Group Secon Group Use a = 0.05. Question 6: 9 10 11 12 13 10 11 14 15 9 9 8 13 10 14 Calculate the value of "t" and examine the significant difference between the two means. The two samples A and B detailed below were taken from normal population with standard deviation 0.8. Test whether difference of means is significant at the 5% level or significance. 8.3 9.3 9.6 10.4 10.7 10.4 10.9 11.9 11.5 12.2 11.6 12.7 12.8 12.9 13.6